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• Rails migration to add boolean column to Postgres on Heroku

  - by pmc255

  I'm trying to execute a simple Rails migration to add a boolean column to an existing table. Here's the add_column call: add_column :users, :soliciting, :boolean, :null => false, :default => false However, after the migration runs (successfully, with no errors), I don't see the new column. If I go into the console and list the columns on the User table, for example, with this command: >> User.columns.each { |c| puts "#{c.name} : #{c.type}" } All the other columns show up, but not the one I just added with the migration. What's even more strange is that looking up a random user object yields the Postgres version of booleans (Ruby strings) >> User.find(1).soliciting => "t" However, the existing boolean columns all show up with standard Ruby boolean values of true and false. What's going on here? Is the migration actually complete? Why doesn't the column show up, yet is accessible in the model objects?

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• Paging Through Records(json data) Using jQuery...

  - by Pandiya Chendur

  I have a JSON result that contains numerous records. I'd like to show the first five records in one page and create pager links which have to move to that page with five record so on. I don't want the page to refresh which is why I'm hoping a combination of JavaScript and jQuery... My json Data looks like this... {"Table" : [{"Emp_Id" : "3","Identity_No" : "","Emp_Name" : "Jerome","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Supervisior","Desig_Description" : "Supervisior of the Construction","SalaryBasis" : "Monthly","FixedSalary" : "25000.00"},{"Emp_Id" : "4","Identity_No" : "","Emp_Name" : "Mohan","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Acc ","Desig_Description" : "Accountant","SalaryBasis" : "Monthly","FixedSalary" : "200.00"},{"Emp_Id" : "5","Identity_No" : "","Emp_Name" : "Murugan","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Mason","Desig_Description" : "Mason","SalaryBasis" : "Weekly","FixedSalary" : "150.00"},{"Emp_Id" : "6","Identity_No" : "","Emp_Name" : "Ram","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Mason","Desig_Description" : "Mason","SalaryBasis" : "Weekly","FixedSalary" : "120.00"},{"Emp_Id" : "7","Identity_No" : "","Emp_Name" : "Raja","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Mason","Desig_Description" : "Mason","SalaryBasis" : "Weekly","FixedSalary" : "135.00"},{"Emp_Id" : "8","Identity_No" : "","Emp_Name" : "Raja kumar","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Mason Helper","Desig_Description" : "Mason Helper","SalaryBasis" : "Weekly","FixedSalary" : "105.00"},{"Emp_Id" : "9","Identity_No" : "","Emp_Name" : "Lakshmi","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Mason Helper","Desig_Description" : "Mason Helper","SalaryBasis" : "Weekly","FixedSalary" : "100.00"},{"Emp_Id" : "10","Identity_No" : "","Emp_Name" : "Palani","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Carpenter","Desig_Description" : "Carpenter","SalaryBasis" : "Weekly","FixedSalary" : "200.00"},{"Emp_Id" : "11","Identity_No" : "","Emp_Name" : "Annamalai","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Carpenter","Desig_Description" : "Carpenter","SalaryBasis" : "Weekly","FixedSalary" : "220.00"},{"Emp_Id" : "12","Identity_No" : "","Emp_Name" : "David","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Steel Fixer","Desig_Description" : "Steel Fixer","SalaryBasis" : "Weekly","FixedSalary" : "220.00"},{"Emp_Id" : "13","Identity_No" : "","Emp_Name" : "Chandru","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Steel Fixer","Desig_Description" : "Steel Fixer","SalaryBasis" : "Weekly","FixedSalary" : "220.00"},{"Emp_Id" : "14","Identity_No" : "","Emp_Name" : "Mani","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Steel Helper","Desig_Description" : "Steel Helper","SalaryBasis" : "Weekly","FixedSalary" : "175.00"},{"Emp_Id" : "15","Identity_No" : "","Emp_Name" : "Karthik","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Wood Fixer","Desig_Description" : "Wood Fixer","SalaryBasis" : "Weekly","FixedSalary" : "195.00"},{"Emp_Id" : "16","Identity_No" : "","Emp_Name" : "Bala","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Wood Fixer","Desig_Description" : "Wood Fixer","SalaryBasis" : "Weekly","FixedSalary" : "185.00"},{"Emp_Id" : "17","Identity_No" : "","Emp_Name" : "Tamil arasi","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Wood Helper","Desig_Description" : "Wood Helper","SalaryBasis" : "Weekly","FixedSalary" : "185.00"},{"Emp_Id" : "18","Identity_No" : "","Emp_Name" : "Perumal","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Cook","Desig_Description" : "Cook","SalaryBasis" : "Weekly","FixedSalary" : "105.00"},{"Emp_Id" : "19","Identity_No" : "","Emp_Name" : "Andiappan","Address" : "Madurai","Date_Of_Birth" : "","Desig_Name" : "Watchman","Desig_Description" : "Watchman","SalaryBasis" : "Weekly","FixedSalary" : "150.00"}]} And as of now my result looks like this, http://img401.imageshack.us/img401/2500/yuidtsum.jpg I have used jquery for this, var jsonObj = JSON.parse(HfJsonValue); for (var i = jsonObj.Table.length - 1; i >= 0; i--) { var employee = jsonObj.Table[i]; $('<div class="resultsdiv"><br /><span class="resultName">' + employee.Emp_Name + '</span><span class="resultfields" style="padding-left:100px;">Category&nbsp;:</span>&nbsp;<span class="resultfieldvalues">' + employee.Desig_Name + '</span><br /><br /><span id="SalaryBasis" class="resultfields">Salary Basis&nbsp;:</span>&nbsp;<span class="resultfieldvalues">' + employee.SalaryBasis + '</span><span class="resultfields" style="padding-left:25px;">Salary&nbsp;:</span>&nbsp;<span class="resultfieldvalues">' + employee.FixedSalary + '</span><span style="font-size:110%;font-weight:bolder;padding-left:25px;">Address&nbsp;:</span>&nbsp;<span class="resultfieldvalues">' + employee.Address + '</span></div>').insertAfter('#ResultsDiv'); } My image contains only 6 records as of now.. Any suggestions?

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• Displaytag caption not working

  - by Neeraja

  I am using displaytag to render data, I have it working without any issues. As soon as I use display:caption I get JSP compilation error with the below message. Am I missing anything? I thougt including caption would be simple. If I remove display:caption everything works fine. aaaaa.jsp:527:14: This tag is not recognized. This is the table caption Jsp code: This is the table caption Setup Displaytag1.2 Web-inf/lib Displaytag-1.2.jar Displaytag-export-poi-1.2.jar Displaytag-portlet-1.2.har Itext-1.3.jar Itext-2.0.5.jar WEB-INF/tlds Displaytag.tld Displaytag-12.tld Displaytag-el.td

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• suggestions for Membership in ASP.NET MVC application

  - by mare

  With this question I am mostly looking for answers from people that have implemented the out-of-the-box ASP.NET membership in their own database - I've set up the tables inside my database and as far as I can see they contain mostly what I need but not everything. I will have the notion of a Firm (Company) to which Users will belong so I will have to associate the aspnet_Users with my Firms table (each user will be a member of exactly one firm). If possible, provide some guidelines how did you do it and what I might run into if I have to modify the table design at some point in the future. Preferably I will be using the default Membership provider. I am having trouble to decide whether to go from scratch or use what ASP.NET already offers.

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• Fluent NHibernate - How to map a non nullable foreign key that exists in two joined tables

  - by vakman

  I'm mapping a set of membership classes for my application using Fluent NHibernate. I'm mapping the classes to the asp.net membership database structure. The database schema relevant to the problem looks like this: ASPNET_USERS UserId PK ApplicationId FK NOT NULL other user columns ... ASPNET_MEMBERSHIP UserId PK,FK ApplicationID FK NOT NULL other membership columns... There is a one to one relationship between these two tables. I'm attempting to join the two tables together and map data from both tables to a single 'User' entity which looks like this: public class User { public virtual Guid Id { get; set; } public virtual Guid ApplicationId { get; set; } // other properties to be mapped from aspnetuser/membership tables ... My mapping file is as follows: public class UserMap : ClassMap<User> { public UserMap() { Table("aspnet_Users"); Id(user => user.Id).Column("UserId").GeneratedBy.GuidComb(); Map(user => user.ApplicationId); // other user mappings Join("aspnet_Membership", join => { join.KeyColumn("UserId"); join.Map(user => user.ApplicationId); // Map other things from membership to 'User' class } } } If I try to run with the code above I get a FluentConfiguration exception Tried to add property 'ApplicationId' when already added. If I remove the line "Map(user = user.ApplicationId);" or change it to "Map(user = user.ApplicationId).Not.Update().Not.Insert();" then the application runs but I get the following exception when trying to insert a new user: Cannot insert the value NULL into column 'ApplicationId', table 'ASPNETUsers_Dev.dbo.aspnet_Users'; column does not allow nulls. INSERT fails. The statement has been terminated. And if I leave the .Map(user = user.ApplicationId) as it originally was and make either of those changes to the join.Map(user = user.ApplicationId) then I get the same exception above except of course the exception is related to an insert into the aspnet_Membership table So... how do I do this kind of mapping assuming I can't change my database schema?

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• Render html code in sql server client report (rdlc)

  - by masoud ramezani

  I am using the asp.net web application and microsoft visual studio reportviewer control and rdlc for creating a report ( not using sql server reporting). I used the Product table to view the result. It has five fields and I display all the itemsin the report. One field is Description and it store the html code as the value(eg: <div><ul><li>a</li><li>b</li></ul><b>aaaa</b></div> ). I want to disply the output of this html code in my report's description field. But in my report, it shows the html value that I stored in my table (: <div><ul><li>a</li><li>b</li></ul><b>aaaa</b></div> ). How can I render the html in my report. Please give me a solution.

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• MySQLi PHP: Check if SQL INSERT query was fully successful using MySQLi

  - by Jonathan

  Hi, I have this big function that gets a lot of different data and insert it into multiple tables.. Not all the data is always available so not all the SQL INSERT queries are successful. I need to check which SQL INSERT query was fully successful and which wasn't to the do something with this data (like inserting into a log table or similar). Just to give you an example of how I think it can be done: $sql = 'INSERT INTO data_table (ID, column1, column2) VALUES(?, ?, ?)'; if ($stmt->prepare($sql)) { $stmt->bind_param('iss', $varID, $var1, $var2); if ($stmt->execute()) { $success == TRUE; //or something like that } } I'm not completely sure this is the best way and if its always really show if the data was inserted into the table... Any suggestions??

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• Problems with sending a multipart/alternative email with PHP

  - by saturdayplace

  Here's the script that's builds/sends the email: $boundary = md5(date('U')); $to = $email; $subject = "My Subject"; $headers = "From: [email protected]" . "\r\n". "X-Mailer: PHP/".phpversion() ."\r\n". "MIME-Version: 1.0" . "\r\n". "Content-Type: multipart/alternative; boundary=--$boundary". "\r\n". "Content-Transfer-Encoding: 7bit". "\r\n"; $text = "You really ought remember the birthdays"; $html = '<html> <head> <title>Birthday Reminders for August</title> </head> <body> <p>Here are the birthdays upcoming in August!</p> <table> <tr> <th>Person</th><th>Day</th><th>Month</th><th>Year</th> </tr> <tr> <td>Joe</td><td>3rd</td><td>August</td><td>1970</td> </tr> <tr> <td>Sally</td><td>17th</td><td>August</td><td>1973</td> </tr> </table> </body> </html> '; $message = "Multipart Message coming up" . "\r\n\r\n". "--".$boundary. "Content-Type: text/plain; charset=\"iso-8859-1\"" . "Content-Transfer-Encoding: 7bit". $text. "--".$boundary. "Content-Type: text/html; charset=\"iso-8859-1\"". "Content-Transfer-Encoding: 7bit". $html. "--".$boundary."--"; mail("[email protected]", $subject, $message, $headers); It sends the message just fine, and my recipient receives it, but they get the whole thing in text/plain instead of in multipart/alternative. Viewing the source of the received message gives this (lots of cruft removed): Delivered-To: [email protected] Received: by 10.90.100.4 with SMTP id x4cs111413agb; Wed, 25 Mar 2009 16:39:32 -0700 (PDT) Received: by 10.100.153.6 with SMTP id a6mr85081ane.123.1238024372342; Wed, 25 Mar 2009 16:39:32 -0700 (PDT) Return-Path: <[email protected]> --- snip --- Date: Wed, 25 Mar 2009 17:37:36 -0600 (MDT) Message-Id: <[email protected]> To: [email protected] Subject: My Subject From: [email protected] X-Mailer: PHP/4.3.9 MIME-Version: 1.0 Content-Type: text/plain; boundary="--66131caf569f63b24f43d529d8973560" Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 25 Mar 2009 23:38:30.0531 (UTC) FILETIME=[CDC4E530:01C9ADA2] X-TM-AS-Product-Ver: SMEX-8.0.0.1181-5.600.1016-16540.005 X-TM-AS-Result: No--4.921300-8.000000-31 X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No Multipart Message coming up --66131caf569f63b24f43d529d8973560 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit You really ought remember the birthdays --66131caf569f63b24f43d529d8973560 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: 7bit <html> <head> <title>Birthday Reminders for August</title> </head> <body> <p>Here are the birthdays upcoming in August!</p> <table> <tr> <th>Person</th><th>Day</th><th>Month</th><th>Year</th> </tr> <tr> <td>Joe</td><td>3rd</td><td>August</td><td>1970</td> </tr> <tr> <td>Sally</td><td>17th</td><td>August</td><td>1973</td> </tr> </table> </body> </html> --66131caf569f63b24f43d529d8973560-- It looks like the content-type header is getting changed along the way from multipart/alternative to text/plain. I'm no sysadmin, so if this is a sendmail issue I'm in way over my head. Any suggestions?

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• mySQL - query to combine two tables

  - by W.Gerick

  Hi there, I have two tables. The first one holds information about cities: Locations: locID | locationID | locationName | countryCode | 1 | 2922239 | Berlin | de | 2 | 291074 | Paris | fr | 3 | 295522 | Orlando | us | 3 | 292345 | Tokyo | jp | There is a second table, which holds alternative names for locations. There might be NO alternative name for a location in the Locations table: AlternateNames: altNameID | locationID | alternateName | 1 | 2922239 | Berlino | 2 | 2922239 | Berlina | 3 | 291074 | Parisa | 4 | 291074 | Pariso | 5 | 295522 | Orlandola | 6 | 295522 | Orlandolo | What I would like to get is the locationID, name and the countryCode of a location for a location name search like "Berlin", or "Ber": | locationID | name | countryCode | | 2922239 | Berlin | de | However, if the user searches for "Berlino", I would like to get the alternateName back: | locationID | name | countryCode | | 2922239 | Berlino | de | The "locationName" has a higher priority than the alternateName, if the searchterm matches both. I can't figure out how to build a query to do that. Since the name can come from one of the two tables, it seems quite difficult to me. Any help is really appreciated!

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• Returning to last viewed List page after insert/edit with ASP.NET Dynamic Data

  - by Pat James

  With a pretty standard Dynamic Data site, when the user edits or inserts a new item and saves, the page does a Response.Redirect(table.ListActionPath), which takes the user back to page 1 of the table. If they were editing an item on page 10 (or whatever) and want to edit the next item on that page, they have to remember the page number and navigate back to it. What's the best way to return the user to the list page they last viewed? I can conceive of some solutions using cookies, session state, or query string values to retain this state and making my own Page Template to incorporate it, but I can't help thinking this must be something that was considered when Dynamic Data was created, and there must be something simpler or built-in to the framework that I'm missing here.

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• general database modeling and django specific modeling

  - by Shreko

  I'm wondering what is the best way to model something like the following. Lets say my company sells metal bars (parameters/fields are: length, profile_type, quantity etc.) of different profiles, where profiles may be pipe(pipe_diameter, wall_thickness) or hollow_rectangle(base, height, wall_thickness), or maybe some other profile with different parameters. Lets say maximum number of profiles would be 12, each profile having between 2-5 parameters. Should everything be in a single table like table_bars: id, length, quantity, profile_type, pipe_diameter, wall_thickness, base, height, etc.) where profile type would be (pipe, rectangle etc.) or should every shape have its own table with its own parameters and in table_bars keep only id, length, quantity profile_type and profile_id) and are there any django specific issues is multiple tables are the best answer? Thanks

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• Using a PreparedStatement to persist an array of Java Enums to an array of Postgres Enums

  - by McGin

  I have a Java Enum: public enum Equipment { Hood, Blinkers, ToungTie, CheekPieces, Visor, EyeShield, None;} and a corresponding Postgres enum: CREATE TYPE equipment AS ENUM ('Hood', 'Blinkers', 'ToungTie', 'CheekPieces', 'Visor', 'EyeShield', 'None'); Within my database I have a table which has a column containing an array of "equipment" items: CREATE TABLE "Entry" ( id bigint NOT NULL DEFAULT nextval('seq'::regclass), "date" character(10) NOT NULL, equipment equipment[] ); And finally when I am running my application I have an array of the "Equipment" enums which I want to persist to the database using a Prepared Statement, and for the life of me I can't figure out how to do it. StringBuffer sb = new StringBuffer("insert into \"Entry\" "); sb.append("( \"date\", \"equipment \" )"); sb.append(" values ( ?, ? )"); PreparedStatement ps = db.prepareStatement(sb.toString()); ps.setString("2010-10-10"); ps.set???????????

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• OpenFilesView Displays All Open and Locked Files to Help Resolve In-Use Errors

  - by Jason Fitzpatrick

  Windows: You go to move a file and Windows throws up an “In Use” error. OpenFilesView shows you what application or system process is locking up the files you’re trying to move. Sometimes the culprit is obvious; if you go to move your media folder and you’ve got your media player open watching South Park then shutting down the media player is the obvious solution. Other times the culprit is less obvious; sometimes Windows processes and less-than-obvious applications are accessing your files in ways that aren’t apparent. The screenshot below showcases the “In Use” error: This is where OpenFilesView comes into play. Fire up the application to see a list of all active files on your system. The master list is a bit overwhelming (on our test system there were over 1200 open files) but you use the find command to drill down to specific file or folder names. Once you’ve found the locked file you can close the file handle, kill the process, or bring the process to the front (so you can examine the program, if possible, before terminating it). It’s much more efficient than rebooting in an attempt to shake the In-Use error. OpenFilesView is freeware and works on Windows XP through Windows 7. HTG Explains: Do You Really Need to Defrag Your PC? Use Amazon’s Barcode Scanner to Easily Buy Anything from Your Phone How To Migrate Windows 7 to a Solid State Drive

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• Using wix3 SqlScript to run generated temporary sql-script files.

  - by leiflundgren

  I am starting to write an installer which will use the SqlScript-element. That takes a reference to the Binary-table what script to run. I would like to dynamically generate the script during the installation. I can see three possibilities: Somehow to get SqlScript to read it data from a file rather then a Binary entry. Inject my generated script into the Binary table Using SqlString Which will cause the need to place some rather long strings into Properties, but I guess that shouldn't really be a prolem. Any advice? Regards Leif (My reason, should anyone be interested is that the database should have a job set up, that calls on an installed exe-file. I prefer to create the job using sqlscript. And the path of that file is not known until InstallDir has been choosen.)

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• Java - System design with distributed Queues and Locks

  - by sunny

  Looking for inputs to evaluate a design for a system (java) which would have a distributed queue serving several (but not too many) nodes. These nodes would process objects present in the distributed queue and on occasion require a distributed lock across the cluster on an arbitrary (distributed) data structures. These (distributed) data structures could potentially lie in a distributed cache. Eliminating Terracotta (DSO),Hazelcast and Akka what could be alternative choices. Currently considering zookeeper as a distributed locking mechanism. Since the recommendation of a znode is not to exceed the 1M size , the understanding is that zookeeper should not be used a distributed queue. And also from Netflix curator tech note 4. So should a distributed cache, say like memcached, or redis be used to emulate a distributed queue ? i.e. The distributed queue will be stored in the caches and will be locked cluster-wide via zookeeper. Are there potential pitfalls with this high-level approach. The objects don't need to be taken off the queue. The object will pass through a lifecycle which will determine its removal from the queue. There would be about 10k+ objects in a queue at a given time changing states and any node could service one stage of the object's lifecycle. (Although not strictly necessary .. i.e. one node could serve the entire lifecycle if that is more efficient.) Any suggestions/alternatives ? sidenote: new to zookeeper ; redis etc.

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• High CPU usage compared to WinXP. Common aps and actions use 100% CPU cycles

  - by Jopower

  I'm running Lubunto 14.04.1 LTS. PC is a 2004 HP ze4200 laptop: 1.8 ghz Celeron M with 1 gb RAM and 80 gb drive. Was running fine on WinXP SP3 and I cleaned the drive off to test Lubuntu 14 LTS. No anti-virus is installed yet. I enabled the CPU resource monitor to see how various programs drag the OS. Using Firefox 31 online right now, I see doing basic functions like openning a new tab and scrolling down a page are using 100% CPU time, ocassionally for 10-30 seconds. In fact some pretty basic aps like Leafnote hit 100% for a second. Wordpad never did that. Lubuntu Software Center locks things up at 100% for 10 seconds. Just typing here shows a 60-80% spike every character. Running the mouse around the screen for 10 seconds results in a sustained 100% load during that time. Right now, if I let the PC rest just idling Firefox and not doing anything with it, CPU use bounces from 20-40% all by itself. WinXP idles at 2-10% and it's considered not good for it to be above 20%... something odd must be happening. Sure, XP will give similar higher CPU cycles with program use, but it's not locking and slogging like this. Lubuntu is supposed to be a light OS and by memory usage it is and I'm happy since this is an old PC maxed for memory upgrades. However, being used to doing some tuning and wary of abnormalities going on in the background, the CPU use indicates things going on that I want to know about and perhaps apply a tweek or two. Recommendations are appreciated. And this 300 point "new tags" restriction bites!

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• how to serialize a DataTable to json or xml

  - by loviji

  Hello, i'm trying to serialize DataTable to Json or XML. is it possibly and how? any tutorials and ideas, please. For example a have a sql table: CREATE TABLE [dbo].[dictTable]( [keyValue] [int] IDENTITY(1,1) NOT NULL, [valueValue] [int] NULL, CONSTRAINT [Psd2Id] PRIMARY KEY CLUSTERED ( [keyValue] ASC )WITH (PAD_INDEX = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY] ) ON [PRIMARY] C# code: string connectionString = "server=localhost;database=dbd;uid=**;pwd=**"; SqlConnection mySqlConnection = new SqlConnection(connectionString); string selectString = "SELECT keyValue, valueValue FROM dicTable"; SqlCommand mySqlCommand = mySqlConnection.CreateCommand(); mySqlCommand.CommandText = selectString; SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter(); mySqlDataAdapter.SelectCommand = mySqlCommand; DataSet myDataSet = new DataSet(); mySqlConnection.Open(); string dataTableName = "dictionary"; mySqlDataAdapter.Fill(myDataSet, dataTableName); DataTable myDataTable = myDataSet.Tables[dataTableName]; //now how to serialize it?

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• Nhibernate: One-To-Many mapping problem - Cannot cascade delete without inverse. Set NULL error

  - by KnaveT

  Hi, I have the current scenario whereby an Article has only 1 Outcome each. Each Article may or may not have an Outcome. In theory, this is a one-to-one mapping, but since NHibernate does not really support one-to-one, I used a One-To-Many to substitute. My Primary Key on the child table is actually the ArticleID (FK). So I have the following setup: Classes public class Article { public virtual Int32 ID { get;set;} private ICollection<ArticleOutcome> _Outcomes {get;set;} public virtual ArticleOutcome Outcome { get { if( this._Outcomes !=null && this._Outcomes.Count > 0 ) return this._Outcomes.First(); return null; } set { if( value == null ) { if( this._Outcomes !=null && this._Outcomes.Count > 0 ) this._Outcomes.Clear(); } else { if( this._Outcomes == null ) this._Outcomes = new HashSet<ArticleOutcome>(); else if ( this._Outcomes.Count >= 1 ) this._Outcomes.Clear(); this._Outcomes.Add( value ); } } } } public class ArticleOutcome { public virtual Int32 ID { get;set; } public virtual Article ParentArticle { get;set;} } Mappings public class ArticleMap : ClassMap<Article> { public ArticleMap() { this.Id( x=> x.ID ).GeneratedBy.Identity(); this.HasMany<ArticleOutcome>( Reveal.Property<Article>("_Outcomes") ) .AsSet().KeyColumn("ArticleID") .Cascade.AllDeleteOrphan() //Cascade.All() doesn't work too. .LazyLoad() .Fetch.Select(); } } public class ArticleOutcomeMap : ClassMap<ArticleOutcome> { public ArticleOutcomeMap(){ this.Id( x=> x.ID, "ArticleID").GeneratedBy.Foreign("ParentArticle"); this.HasOne( x=> x.ParentArticle ).Constrained (); //This do not work also. //this.References( x=> x.ParentArticle, "ArticleID" ).Not.Nullable(); } } Now my problem is this: It works when I do an insert/update of the Outcome. e.g. var article = new Article(); article.Outcome = new ArticleOutcome { xxx = "something" }; session.Save( article ); However, I encounter SQL errors when attempting to delete via the Article itself. var article = session.Get( 123 ); session.Delete( article ); //throws SQL error. The error is something to the like of Cannot insert NULL into ArticleID in ArticleOutcome table. The deletion works if I place Inverse() to the Article's HasMany() mapping, but insertion will fail. Does anyone have a solution for this? Or do I really have to add a surrogate key to the ArticleOutcome table?

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• How to avoid using duplicate savepoint names in nested transactions in nested stored procs?

  - by Gary McGill

  I have a pattern that I almost always follow, where if I need to wrap up an operation in a transaction, I do this: BEGIN TRANSACTION SAVE TRANSACTION TX -- Stuff IF @error <> 0 ROLLBACK TRANSACTION TX COMMIT TRANSACTION That's served me well enough in the past, but after years of using this pattern (and copy-pasting the above code), I've suddenly discovered a flaw which comes as a complete shock. Quite often, I'll have a stored procedure calling other stored procedures, all of which use this same pattern. What I've discovered (to my cost) is that because I'm using the same savepoint name everywhere, I can get into a situation where my outer transaction is partially committed - precisely the opposite of the atomicity that I'm trying to achieve. I've put together an example that exhibits the problem. This is a single batch (no nested stored procs), and so it looks a little odd in that you probably wouldn't use the same savepoint name twice in the same batch, but my real-world scenario would be too confusing to post. CREATE TABLE Test (test INTEGER NOT NULL) BEGIN TRAN SAVE TRAN TX BEGIN TRAN SAVE TRAN TX INSERT INTO Test(test) VALUES (1) COMMIT TRAN TX BEGIN TRAN SAVE TRAN TX INSERT INTO Test(test) VALUES (2) COMMIT TRAN TX DELETE FROM Test ROLLBACK TRAN TX COMMIT TRAN TX SELECT * FROM Test DROP TABLE Test When I execute this, it lists one record, with value "1". In other words, even though I rolled back my outer transaction, a record was added to the table. What's happening is that the ROLLBACK TRANSACTION TX at the outer level is rolling back as far as the last SAVE TRANSACTION TX at the inner level. Now that I write this all out, I can see the logic behind it: the server is looking back through the log file, treating it as a linear stream of transactions; it doesn't understand the nesting/hierarchy implied by either the nesting of the transactions (or, in my real-world scenario, by the calls to other stored procedures). So, clearly, I need to start using unique savepoint names instead of blindly using "TX" everywhere. But - and this is where I finally get to the point - is there a way to do this in a copy-pastable way so that I can still use the same code everywhere? Can I auto-generate the savepoint name on the fly somehow? Is there a convention or best-practice for doing this sort of thing? It's not exactly hard to come up with a unique name every time you start a transaction (could base it off the SP name, or somesuch), but I do worry that eventually there would be a conflict - and you wouldn't know about it because rather than causing an error it just silently destroys your data... :-(

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• MKMapView within UITableView

  - by john-london

  I have a MKMapView within a UITableviewCell and I want to be able to disable scrolling of the table view when the user starts to drag within the map view. My plan had been to override the MKMapView touchesBegan/Moved etc methods and if they were called to then disable scrolling in the parent view. Scrolling in the parent view would be enabled again only when the touches in the MKMapView ended or were cancelled. My problem is that the touchesBegan/Moved methods inside MKMapView are not called - the problem is also discussed here: stackoverflow discussion. My table view is within a tab control, so I don't think I can extend UIWindow the way they describe, as there are several views that could be within the window, depending on which tab is active. How can I access the MKMapView touch events please?

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• icefaces datatable component

  - by chetan

  I have two datatable in two different jspx page but when I call one then i try to call other old one still display what is the problem there. from the old page only datatable is display no other component are displayed. This is one jspx page -- -- <div style="margin-bottom: 20px;"> <div> <div class="page-navi"> <ice:dataPaginator id="dataScroll_3" for="companyDataTable1" paginator="true"> <f:facet name="first"> <ice:graphicImage url="/xmlhttp/css/xp/css-images/arrow-first.gif" title="First Page" /> </f:facet> <f:facet name="last"> <ice:graphicImage url="/xmlhttp/css/xp/css-images/arrow-last.gif" title="Last Page" /> </f:facet> <f:facet name="previous"> <ice:graphicImage url="/xmlhttp/css/xp/css-images/arrow-previous.gif" title="Previous Page" /> </f:facet> <f:facet name="next"> <ice:graphicImage url="/xmlhttp/css/xp/css-images/arrow-next.gif" title="Next Page" /> </f:facet> </ice:dataPaginator> </div> <ice:panelGroup> <ice:dataTable id="companyDataTable1" rendered="#{createLeaveBean.empRender}" binding="#{createLeaveBean.empTable}" value="#{createLeaveBean.lstEmployeeeInfo}" var="currentRow" width="80%" cellpadding="0" cellspacing="0" headerClass="std-table-header" styleClass="std-table" rows="10"> <ice:column style="width: 1%"> <f:facet name="header"> <ice:selectBooleanCheckbox id="selectallemp" partialSubmit="true" value="#{createLeaveBean.selectAll}" valueChangeListener="#{createLeaveBean.toggleSelectedFields}" onkeydown="moveFocus(event,'selectoneemp')" tabindex="8"></ice:selectBooleanCheckbox> </f:facet> <ice:selectBooleanCheckbox id="selectoneemp" value="#{currentRow.notify}" tabindex="9" ></ice:selectBooleanCheckbox> </ice:column> <ice:column style="width: 5%;"> <f:facet name="header"><ice:outputText value="Employee Id" /></f:facet> <ice:outputText value="#{currentRow.employeeInfoId}" /> </ice:column> <ice:column style="width: 34%;"> <f:facet name="header"><ice:outputText value="Employee Name" /></f:facet> <ice:outputText value="#{currentRow.firstName}" /> </ice:column> </ice:dataTable> </ice:panelGroup> </div> <ice:commandButton id="createleave" tabindex="12" value="Create" action="#{createLeaveBean.createLeavePolicyEmp}" styleClass="std-btn" style="margin-right: 10px;margin-left: 50px;margin-top: 15px"></ice:commandButton> <ice:commandButton id="cancelleave" tabindex="13" value="Cancel" action="#{createLeaveBean.cancelLeavePolicyEmp}" rendered="true" styleClass="std-btn" style="margin-top: 15px"></ice:commandButton> </div> This is second jspx page <div class="page-navi"> <ice:dataPaginator id="dataScroll_4" for="companyDataTable2" paginator="true"> <f:facet name="first"> <ice:graphicImage url="/xmlhttp/css/xp/css-images/arrow-first.gif" title="First Page" /> </f:facet> <f:facet name="last"> <ice:graphicImage url="/xmlhttp/css/xp/css-images/arrow-last.gif" title="Last Page" /> </f:facet> <f:facet name="previous"> <ice:graphicImage url="/xmlhttp/css/xp/css-images/arrow-previous.gif" title="Previous Page" /> </f:facet> <f:facet name="next"> <ice:graphicImage url="/xmlhttp/css/xp/css-images/arrow-next.gif" title="Next Page" /> </f:facet> </ice:dataPaginator> </div> <ice:panelGroup> <ice:dataTable id="companyDataTable2" rendered="#{createLeaveBean.deptRender}" binding="#{createLeaveBean.empTable}" value="#{createLeaveBean.lstEmployeeeInfo}" var="currentRowww" width="96%" cellpadding="0" cellspacing="0" headerClass="std-table-header" styleClass="std-table" rows="10"> <ice:column style="width: 5%;"> <f:facet name="header"><ice:outputText value="Employee Id" /></f:facet> <ice:outputText value="#{currentRowww.employeeInfoId}" /> </ice:column> <ice:column style="width: 34%;"> <f:facet name="header"><ice:outputText value="Employee Name" /></f:facet> <ice:outputText value="#{currentRowww.firstName}" /> </ice:column> </ice:dataTable> </ice:panelGroup> <ice:commandButton id="createLeave" value="Create" action="#{createLeaveBean.createLeavePolicyDept}" styleClass="std-btn" tabindex="8" style="margin-right: 10px;margin-left: 40px;margin-top: 15px"></ice:commandButton> <ice:commandButton id="cancelLeave" value="Cancel" action="#{createLeaveBean.cancelLeavePolicyDept}" rendered="true" styleClass="std-btn" tabindex="9" style="margin-top: 15px"></ice:commandButton>

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• Interfaces with hibernate annotations

  - by molleman

  Hello i am wondering how i would be able to annotate an interface @Entity @Table(name = "FOLDER_TABLE") public class Folder implements Serializable, Hierarchy { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "folder_id", updatable = false, nullable = false) private int fId; @Column(name = "folder_name") private String folderName; @OneToMany(cascade = CascadeType.ALL) @JoinTable(name = "FOLDER_JOIN_FILE_INFORMATION_TABLE", joinColumns = { @JoinColumn(name = "folder_id") }, inverseJoinColumns = { @JoinColumn(name = "file_information_id") }) private List< Hierarchy > fileInformation = new ArrayList< Hierarchy >(); above and below are 2 classes that implement an interface called Hierarchy, the folder class has a list of Hierarchyies being a folder or a fileinformation class @Entity @Table(name = "FILE_INFORMATION_TABLE") public class FileInformation implements Serializable, Hierarchy { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "file_information_id", updatable = false, nullable = false) private int ieId; @Column (name = "location") private String location; i have serached the web for someway to annotate or a workaround but i cannot map the interface which is simply this public interface Hierarchy { } i get a mapping exeception on the List of hierarchyies with a folder but i dont know how to map the class correctly

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• Form repeats values

  - by Tunji Gbadamosi

  I have a dynamically generated form to accept guest details and store the results into the a session array. However, when I retrieve the details, I keep finding that the last two guest details are always the same even though different inputs were given. Here's my form for getting the values (guests.php): <?php session_start(); require_once 'FormDB.php'; include 'connect.php'; include 'guests_.php'; ?> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Enter guest details</title> <script language="JavaScript" type="text/javascript" src="validation_functions.js"></script> </head> <body> <?php if($_SESSION['logged_in']){ //print '<script type="text/javascript">'; //print 'alert("You have successfully logged in '. $_SESSION['volunteer']['first_name'].'")'; //print '</script>'; $first_name="first_name"; $surname="surname"; $sex="sex"; $age = "age"; echo $error; //echo '<form name="choose" action="tables.php" method="post" onsubmit="return validate_guests(this);">'; echo '<form name="choose" action="guests.php" method="post" onsubmit="return validate_guests(this);">'; echo '<input type="hidden" name="hidden_value" value="'.$_SESSION['no_guests'].'" />'; if($_SESSION['no_guests'] >= 1){ echo '<table border="1">'; echo '<th>First Name</th>'; echo '<th>Surname</th>'; echo '<th>Day of Birth</th>'; echo '<th>Month of Birth</th>'; echo '<th>Year of Birth</th>'; echo '<th>Sex</th>'; //echo '<div id="volunteer">'; echo '<tr>'; echo '<td>'; echo $_SESSION['volunteer']['first_name']; echo '</td>'; echo '<td>'; echo $_SESSION['volunteer']['surname']; echo '</td>'; echo '<td>'; echo $_SESSION['volunteer']['dob_day']; echo '</td>'; echo '<td>'; echo $_SESSION['volunteer']['dob_month']; echo '</td>'; echo '<td>'; echo $_SESSION['volunteer']['dob_year']; echo '</td>'; echo '<td>'; echo $_SESSION['volunteer']['sex']; echo '</td>'; echo '</tr>'; //echo '</div>'; for($i=0;$i<$_SESSION['no_guests'];$i++){ //$guest = "guest_".$i; //echo '<div class="'.$guest.'">'; echo '<tr>'; echo '<td>'; echo '<input type="text" name="guest['.$i.']['.$first_name.']" id="fn'.$i.'">'; echo '</td>'; echo '<td>'; echo '<input type="text" name="guest['.$i.']['.$surname.']" id="surname'.$i.'">'; echo '</td>'; echo '<td>'; echo '<select name="guest['.$i.'][dob_day]" id="dob_day'.$i.'">'; for($j=1;$j<32;$j++){ echo"<option value='$j'>$j</option>"; } echo '</select>'; echo '</td>'; echo '<td>'; echo '<select name="guest['.$i.'][dob_month] id="dob_month'.$i.'">'; for($j=0;$j<sizeof($month);$j++){ $value = ($j + 1); echo"<option value='$value'>$month[$j]</option>"; } echo '</select>'; echo '</td>'; echo '<td>'; echo '<select name="guest['.$i.'][dob_year] id="dob_year'.$i.'">'; for($j=1900;$j<$year_limit;$j++){ echo"<option value='$j'>$j</option>"; } echo '</select>'; echo '</td>'; echo '<td>'; echo '<select name="guest['.$i.']['.$sex.']" id="sex'.$i.'">'; echo '<option>Female</option>'; echo '<option>Male</option>'; echo '</select>'; echo '</td>'; echo '</tr>'; //echo '</div>'; } echo '</table>'; } else{ echo '<table border="1">'; echo '<th>First Name</th>'; echo '<th>Surname</th>'; echo '<th>Day of Birth</th>'; echo '<th>Month of Birth</th>'; echo '<th>Year of Birth</th>'; echo '<th>Sex</th>'; echo '<th>Table</th>'; echo '<th>Seat</th>'; echo '<th>Menu</th>'; //echo '<div id="volunteer">'; echo '<tr>'; echo '<td>'; echo $_SESSION['volunteer']['first_name']; echo '</td>'; echo '<td>'; echo $_SESSION['volunteer']['surname']; echo '</td>'; echo '<td>'; echo $_SESSION['volunteer']['dob_day']; echo '</td>'; echo '<td>'; echo $_SESSION['volunteer']['dob_month']; echo '</td>'; echo '<td>'; echo $_SESSION['volunteer']['dob_year']; echo '</td>'; echo '<td>'; echo $_SESSION['volunteer']['sex']; echo '</td>'; echo '</tr>'; //echo '</div>'; } echo '</table>'; echo '<input type="submit" value="Submit">'; echo '</form>'; } else{ print '<script type="text/javascript">'; print 'alert("You have not successfully logged in '. $_SESSION['volunteer']['first_name'].'")'; print '</script>'; } ?> </body> Here's my code for processing the details (guests_.php): <?php $error = ""; if($_POST){ //$guests = array(); $guests = isset($_POST['guest']) ? $_POST['guest'] : null; if($guests){ foreach($guests as &$guest){ $guest['first_name'] = ucwords(strip_tags($guest['first_name'])); $guest['surname'] = ucwords(strip_tags($guest['surname'])); $guest['dob_day'] = ucwords(strip_tags($guest['dob_day'])); $guest['dob_month'] = ucwords(strip_tags($guest['dob_month'])); $guest['dob_year'] = ucwords(strip_tags($guest['dob_year'])); $guest['sex'] = ucwords(strip_tags($guest['sex'])); } } foreach($guests as $guest){ $date = $form->create_date($guest['dob_day'], $guest['dob_month'], $guest['dob_year']); $exist = $form->user_exists($guest['first_name'], $guest['surname'], $date, $guest['sex']); if($exist != ""){ $error .= $exist; } } if($error == ""){ //$_SESSION['existent_guests'] = FALSE; $_SESSION['guests'] = $guests; $form->set_guests($_SESSION['guests']); //$form->set_volunteer($_SESSION['volunteer']); header("location: tables.php"); exit(); } } ?>

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• MS SQL Server 15MM rows, simple COUNT query. 15+ seconds?

  - by john

  We took over a website from another company after a client decided to switch. We have a table that grows by about 25k records a day, and is currently at 15MM records. The table looks something like: id (PK, int, not null) member_id (int, not null) another_id (int, not null) date (datetime, not null) SELECT COUNT(id) FROM tbl can take up to 15 seconds. A simple inner join on 'another_id' takes over 30 seconds. I can't imagine why this is taking so long. Any advice? SQL Server 2005 Express

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• Using PHP/MySQL with Google Maps

  - by Anders Kitson

  Hiya, I followed this tutorial below http://code.google.com/apis/maps/articles/phpsqlajax_v3.html#outputxml I ran into trouble, near then end, I am hoping someone else here has got this working and can help me discover my problem. Simply there are 4 steps to this tutorial Creating the Table Populating the Table Outputting XML with PHP Creating the Map I successfully have completed all the steps, however the outputted xml isn't read by the google map I created. The files are all on the same directory, and I didn't change any of the file names from the tutorial. The tutorial has a step to test if the php file called phpsqlajax_genxml.php is outputting the xml and I successfully tested it and it was. The problem is that the map isn't rendering the items I have in the database, that should be converted to xml for the map to read. Any help, or pointing me in the right direction would be much appreciated.

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