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• How to handle updating JDO class definitions on Google App Engine

  - by Spines

  I'm using the Google app engine and JDO. What is the best way to update a JDO class definition without having to wipe the data store contents first? I'm not sure if this is specific to JDO on GAE, but I noticed that when I simply change the name of one of my persistent fields from svotes to votes, an exception is thrown (java.lang.NoSuchFieldError: svotes). I expect once my site goes live I might want to make some changes to my JDO class definitions, such as adding a field or something. Any suggestions for how to update the data definitions without having to wipe the database?

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• How to log POSTed forms submissions?

  - by justSteve

  Back in the ASP classic days when i needed to write out the name/value pairs of forms submitted by POST i thru this loop into the page: on error resume next for each x in Request.Form Response.AppendToLog x & "=" & Request(x) next It threw all the form fields and values into the log just as GETs are. Does IIS7 .net give me any better method? (this is for the dev/testing portion of the project i don't have any concern about the space or cycles used to accomplish this). thx

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• How to index and search .doc files

  - by Jared

  I have an application that needs to have .doc files uploaded to it. These documents should then be index and the whole collection of documents should be searchable. This will run on a Windows Server, without Word installed, using IIS and SqlServer, but I'd rather not be tied to SqlServer's full text indexing. I was thinking of using Lucene.Net for the indexing part and was wondering what the best way to get the text out of the .doc files would be. I could probably extract the text by reading in the whole stream and then using a regEx to pull out any regular characters, but that seems hefty and prone to error. I saw an article on using iFilters that sounds promising, but I thought I'd put this out there since it's not something I'm familiar with. P.S. If it matters, these .doc files will have mail-merge fields in them and there's no other current alternative for the .doc format.

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• How can I use html/javascript to make <a> link trigger an embedded flash object?

  - by MikeN

  Using HTML/Javascript I want to make an link trigger a flash object that is normally triggered by clicking on the flash itself. The flash objects is actually the "Call Me Now" button from Google Voice which looks something like: <object type="application/x-shockwave-flash" data="https://clients4.google.com/voice/embed/webCallButton" width="230" height="85"> <param name="movie" value="https://clients4.google.com/voice/embed/webCallButton"/> <param name="wmode" value="transparent" /><param name="FlashVars" /> </object> When you click on the object the first time it brings up a set of fields to enter your phone number in to make the call. So I want to be able to trigger that action by having a user click on a different link (which would actually be the phone number that the widget would call.)

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• Excel - referenced values via OleDB from .Net client

  - by ho

  I'm trying to read an Excel file (.xls, I think Excel 2003 compatible) via OleDB, but it fails to get the values for referenced fields. This is my current test code (please note, this is just part of the class): Private m_conn As OleDbConnection Public Sub New(ByVal fileName As String) Dim connString As String = String.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties=Excel 8.0;", fileName) m_conn = New OleDbConnection(connString) m_conn.Open() End Sub Public Sub GetSheet(ByVal sheet As String) Dim query As String = String.Format("SELECT * FROM [{0}]", sheet) Using cmd As OleDbCommand = m_conn.CreateCommand() cmd.CommandText = query Dim ds As New DataSet() Dim a As New OleDbDataAdapter(cmd) Using rdr As OleDbDataReader = cmd.ExecuteReader() While rdr.Read() Debug.WriteLine(rdr.Item(0).ToString()) End While End Using End Using End Sub But if the value is a reference (something like =+'MySheetName'!K37), I just get a DBNull from the call to rdr.Item(0). I can get around this by automating Excel instead, but would prefer not to have to use Excel automation so wondering if anyone knows how to do it.

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• Javascript: Save json data as a file on the server / user's hard disk.

  - by DavidR

  I have developed an app that allows the user to fill out text fields with information. I want them to be able to press a button that will make a file with data (a really long array with info on what they typed and where it should go) so they can reload the data at a later date. I don't have a server now, and I am sending this app as a standalone html app to my friends for their use until I get hosing / mySql / etc. Is there a way that when they click on a button it will take this data (saved as an array, save_data), put it into a file, and basically begin the download process from their web-browser? And later on, what tech would I need to be looking into to save this into online user accounts?

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• Passing a formula field value into a Crystal Reports command

  - by DarkDeny

  Hello eveybody! I have a report, in which I calculate starting date via Formula Fields. Then I need to pass calculated value into a subreport, where I can use it as one of the parameters for the stored procedure in my database. The problem is that for some reason value of the corresponding parameter when the database is queried is empty (or null, I am not sure exactly). What can be wrong in my report template? The formula I use is: ToText( ShiftDateTime ({@StartDate}, {?TimeZone}, "UTC,0")) Name of this formula field is StartDate I pass it into subreport as a Pm-?@StartDateUTC (also tried Pm-@StartDateUTC). I am sure, that @StartDate has correct value (tested in preview with this field in report), also Pm-?@StartDateUTC does has a value, but when CR is accessing DB - the result is empty field value...

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• Style question: Writing "this." before instance variable and methods: good or bad idea?

  - by Uri

  One of my nasty (?) programming habits in C++ and Java is to always precede calls or accesses to members with a this. For example: this.process(this.event). A few of my students commented on this, and I'm wondering if I am teaching bad habits. My rationale is: 1) Makes code more readable — Easier to distinguish fields from local variables. 2) Makes it easier to distinguish standard calls from static calls (especially in Java) 3) Makes me remember that this call (unless the target is final) could end up on a different target, for example in an overriding version in a subclass. Obviously, this has zero impact on the compiled program, it's just readability. So am I making it more or less readable? Related Question Note: I turned it into a CW since there really isn't a correct answer.

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• Left Join works with table but fails with query

  - by Frank Martin

  The following left join query in MS Access 2007 SELECT Table1.Field_A, Table1.Field_B, qry_Table2_Combined.Field_A, qry_Table2_Combined.Field_B, qry_Table2_Combined.Combined_Field FROM Table1 LEFT JOIN qry_Table2_Combined ON (Table1.Field_A = qry_Table2_Combined.Field_A) AND (Table1.Field_B = qry_Table2_Combined.Field_B); is expected by me to return this result: +--------+---------+---------+---------+----------------+ |Field_A | Field_B | Field_A | Field_B | Combined_Field | +--------+---------+---------+---------+----------------+ |1 | | | | | +--------+---------+---------+---------+----------------+ |1 | | | | | +--------+---------+---------+---------+----------------+ |2 |1 |2 |1 |John, Doe | +--------+---------+---------+---------+----------------+ |2 |2 | | | | +--------+---------+---------+---------+----------------+ [Table1] has 4 records, [qry_Table2_Combined] has 1 record. But it gives me this: +--------+---------+---------+---------+----------------+ |Field_A | Field_B | Field_A | Field_B | Combined_Field | +--------+---------+---------+---------+----------------+ |2 |1 |2 |1 |John, Doe | +--------+---------+---------+---------+----------------+ |2 |2 |2 | |, | +--------+---------+---------+---------+----------------+ Really weird is that the [Combined_Field] has a comma in the second row. I use a comma to concatenate two fields in [qry_Table2_Combined]. If the left join query uses a table created from the query [qry_Table2_Combined] it works as expected. Why does this left join query not give the same result for a query and a table? And how can i get the right results using a query in the left join?

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• selecting a range of verses from a database

  - by Noam Smadja

  i have a database, with verses from the bible, with those fields: book (book number), chapter (chapter number), verse (verse number), text (the verse) example: 1 1 1 In the beginning God created the heaven and the earth. first 1 is for Genesis, second 1 is for chapter 1, third 1 is for verse 1 user gives me something like 1 1:1 - 1 1:4 which means he wants to show Genesis 1:1-4. what i want to do is something like SELECT book*100000+chapter*1000+verse AS index FROM bible WHERE index >= 1001001 AND index <=1001004 or WHERE book*100000+chapter*1000+verse >= 1001001 AND book*100000+chapter*1000+verse <= 1001004

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• Architecting a generic search result web control

  - by Bartek Tatkowski

  In a project I'm currently working for we've stumbled upon the need for several kinds of search results presentation controls. The search result are similar, but not identical. For example, in the "office search" result we might want to present the office name and location, while in the "document search" could contain document name, author and publishing date. These fields should be sortable. My current strategy is to employ the Factory pattern and do something like this: ISearchResult officeResults = SearchResultFactory.CreateOfficeSearchResults(data); ISearchResult documentResults = SearchResultFactory.CreateDocumentSearchResults(data); The problem is: I don't know how to implement the markup code. Should I just do Controls.Add(officeResults); in the containing page? Or is there some ASPX trickery to create generic web controls? Or maybe I'm overthinking this and just should create five classes? ;)

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• Multlingual redirect

  - by israkir

  I want to ignore the post form in the django's internatonalization. I am using the django-multilingual app, so I have different fields for different languages in the db. I come up with this idea: For each language, from the index.html page, redirect to a different url (e.g. /en/ or /de/ or /zh/). And each view of this urls, set the session according to the language like this: def set_lang_en(request): request.session['django_language'] = 'en' render_to_response("home.html") def set_lang_zh(request): request.session['django_language'] = 'zh-cn' render_to_response("home.html") Interestingly, this does the job, but if i refresh the page again after redirection (home.html). Why it is like this? And how can solve this problem either in my direction or other one?

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• Access Validation Rule Violations on Append Query

  - by Jacques Tardie

  I'm recieving the following error on trying to run an append query in access. Microsoft Office Access set .... and it didnt't add... 779280 records(s) due to validation rule violations. If I choose to run the query anyways, nothing actually happens. To give some context, I'm simply trying to copy a populated field, consisting of values similar to "16-2009-02, 34-2010-02, et cetera" to another currently unpopulated field. The fields themselves have no set validation rules, and both have the standard text field options. I'm hoping to be able to simply remove those hyphens, and fix the issue. But I guess that's what I'm not sure about, are those hyphens actually a problem? Running SP3 w/ Access 2003. Thanks in advance!

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• Comparing an id to id of different tables rows mysql

  - by jett

  So I am trying to retrieve all interests from someone, and be able to list them. This works with the following query. SELECT *,( SELECT GROUP_CONCAT(interest_id SEPARATOR ",") FROM people_interests WHERE person_id = people.id ) AS interests FROM people WHERE id IN ( SELECT person_id FROM people_interests WHERE interest_id = '.$site->db->clean($_POST['showinterest_id']).' ) ORDER BY lastname, firstname In this one which I am having trouble with, I want to select only those who happen to have their id in the table named volleyballplayers. The table just has an id, person_id, team_id, and date fields. SELECT *,( SELECT GROUP_CONCAT(interest_id SEPARATOR ",") FROM people_interests WHERE person_id = people.id ) AS interests FROM people WHERE id IN ( SELECT person_id FROM people_interests WHERE volleyballplayers.person_id = person_id ) ORDER BY lastname, firstname I just want to make sure that only the people who are in the volleyballplayers table show up, but I am getting an error saying that Unknown column 'volleyballplayers.person_id' in 'where clause' although I am quite sure of the name of table and I know the column is named person_id.

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• Drupal Webforms module - Form results say "Array" instead of form values

  - by Doc Falken

  I have a simple form built with the Webforms module in Drupal. The standard textfield form fields work perfectly. However if I use the preset date or time form values, they don't get emailed properly when the form is submitted. For instance, if there was a date field in my form, it would submit fine and render on the results page just fine, but if I wanted that value to be included in an email, it would show up as "Array" within the text of the email instead of showing the date. There is an open support issue within the module issues page, but I'm hoping for any additional help.

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• PHP registration script: verifying and telling the user what went wrong

  - by Maxime

  Hi, I'm building a registration script and I want to insert the user's input (username, mail) ONLY if it's not already in the database. What I usually do in such cases is a request to see if something's already there, something like: "SELECT * FROM things WHERE thing_name = '$treated_user_input'". I have two fields that need to be unique this time though. Is there a way to do only one SELECT request and still be able to tell the user exactly what field went wrong? Or do I have to do one request per unique field? Thanks for your answers.

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• Building an http packet in libnet(tcp packet), Please help us as soon as posible. we are stuck!

  - by Hila

  we are building a NAT program,we change each packet that comes from our internal subnet, change it's source IP address by libnet functions.( catch the packet with libpcap, put it sniff structures and build the new packet with libnet) over TCP, the syn/ack packets are good after the change, and when a HTTP-GET request is coming, we can see by wireshark that there is an error on the checksum field.. all the other fields are exactly the same as the original packet. Is anyone knows what can cause this problem? the new checksum in other packets is calculated as it should be.. but in the HTTP packet it doesn't..

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• How to allow sorting in the Django admin by a custom list_display field, which doesn't have a DB fie

  - by Gj

  I have a custom list_display field which is responsible for a column of integers in one of my admin pages. I need to allow staff members to sort according to it. There's a solution for how to acheive that if the integer represents a count/average/etc of some DB field, which is not the case for me. [ the solution for that case is here: http://stackoverflow.com/questions/2168475/django-admin-how-to-sort-by-one-of-the-custom-list-display-fields-that-has-no-da ] Any ideas how I can achieve this sorting without actually creating and maintaining a DB field for the values?

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• SaaS Multi-tenancy Applications: How is data import/export/backup being implemented?

  - by Mark Redman

  How are applications providing import / export (or backups) of data in SaaS based multi-tenancy applications, particularly single database designs? Imports: Keeping things simple I think basic imports are useful, ie CSV to a spec (or a way of providing a mapping between CSV columns and fields in the database. Exports: In single database designs I have seen XML exports and HTML (basic sitse generated) exports of data? I would assume that XML is a better option? How does one cater for relational data? Would you reference various things within XML and provide documentation of the relationships or let users figurethis out? Are vendors providing an export/backup that can be imported back in/restored? Your comments appreciated.

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• Sending mail using CDO JavaScript error - Server is undefined

  - by Rotem

  Hi, I got this code to send email using SMTP server, I tried many configuration of it that I found online, also VBscript similar code, and non of it is working. I want to focus on this code, when I'm opening the HTA I'm getting error in line 8, says 'Server is undefined', What should I do to define it? var cdoConfig = Server.CreateObject("CDO.Configuration"); cdoConfig.Fields("cdoSMTPServerName") = "194.90.9.22"; var cdoMessage = Server.CreateObject("CDO.Message"); cdoMessage.Configuration = cdoConfig; var cdoBodyPart = cdoMessage.BodyPart; cdoMessage.To = "[email protected]"; cdoMessage.From = "[email protected]"; cdoMessage.Subject = "CDO Test in JScript"; cdoMessage.TextBody = "This is a test email sent using JScript."; cdoMessage.send(); Thanks, Rotem

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• How do i have optional parameter but still validate them in asp.net mvc routing ?

  - by ooo

  I have this route that i just added routes.MapRoute( "MyRoute", "MyController/{action}/{orgId}/{startDate}/{endDate}", new { controller = "MyController", action = "MyAction", orgId = 0, startDate = DateTime.Today.AddMonths(-1), endDate = DateTime.Today }, new { action = new FromValuesListConstraint(new string[] { "MyAction", "MyActionEx" }), orgId = new IntegerRouteConstraint(), startDate = new DateTimeRouteConstraint(), endDate = new DateTimeRouteConstraint() } when i put in this url, it resolves down to the default route (controller, action,id) and the above rout does not catch this url: http://localhost:1713/MyController/MyAction/16 But this below works fine. http://localhost:1713/MyController/MyAction/16/11-May-10/11-May-10 my question is that i thought both would work as i am giving default values to the startDate and enddate fields i tested this using the RouteDebugger and this route turned up false how can i have these last two parameter as optional but still have the validation ?

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• how to validate username and password in vb6?

  - by srikanth

  i have created a database in mysql5.0. i want to display the data from it. it has table named login. it has 2 columns username and password. in form i have 2 text fields username and password i just want to validate input with database values and display message box. connection from vb to database is established successfully. but its not validating input. its giving error as 'object required'. please any body help i'm new to vb. i'm using vb6 and mysql5.0 thank you

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• Symfony2 & Twig - theming file upload widget

  - by Sacred Socks

  I have an Symfony2 edit form for an entity and one of the fields is for the user's profile picture. I'm trying to theme the Twig file upload widget so that the current picture set for the field is displayed above the file input. So far, I have: {% form_theme edit_form _self %} {% block field_widget %} {% set type = type|default('text') %} {% if type == 'file' %} <img src="{{ value }}" /> {% endif %} {{ block('form_widget_simple') }} {% endblock %} All works well except that the value variable is blank (which makes sense I guess). My question is how can I get hold of the path to the file? Is there a way to pick it out of the form values for the field? Could I perhaps pass it through as an option to the field? Srz if this is a dumb question, still pretty new to Symfony and Twig..

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• FieldError when annotating over foreign keys

  - by X_9

  I have a models file that looks similar to the following: class WithDate(models.Model): adddedDate = models.DateTimeField(auto_now_add=True) modifiedDate = models.DateTimeField(auto_now=True) class Meta: abstract = True class Match(WithDate): ... class Notify(WithDate): matchId = models.ForeignKey(Match) headline = models.CharField(null=True, blank=True, max_length=10) For each Match I'm trying to get a count of notify records that have a headline. So my call looks like matchObjs = Match.objects.annotate(notifies_made=Count('notify__headline__isnull')) This keeps throwing a FieldError. I've simplified the query down to matchObjs = Match.objects.annotate(notifies_made=Count('notify')) And I still get the same FieldError... I've seen this work in other cases (other documentation, other SO questions like this one) but I can't figure out why I'm getting an error. The specific error that is returned is as follows: Cannot resolve keyword 'notify' into field. Choices are: (all fields from Match model) Does anyone have a clue as to why I can't get this annotation to work across tables? I'm baffled after looking at the other SO question and various Django docs where I've seen this done. Edit: I am using Django 1.1.1

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• update table with information from IDirectory

  - by sue

  I have a table with 4 columns, LoginID, LastName, FirstName, Email. The data for LoginID was populated from an other table. I have to write a small routine to update this table, by sending in the LoginID and with help of IDirectory routines, get the Lastname, firstname and email. This is what i'm attempting to do, but getting confused with the right syntax. using (TSADRequestEntities context = UnityHelper.Resolve()) { var fpvalues = context.FOCALPOINTs.ToList(); foreach (var item in fpvalues) { IEnumerable<UserInfo> query = UnityHelper.Resolve<IUserDirectory>().Search(item.LoginID); //Here, FocalPoint is the table that has the loginID and the other fields //I need to update. the query shld now hv info on lastname etc..how do I //retrieve that value and update the table? } }

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