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• Where to put a recursive function when following MVC?

  - by Glibly

  Hello, I have a recursive function being used to generate a menu on my site. The function is calling a database for each level of children in the menu, and generating html for them. I've currently put this function in a Model part of the code, however, I feel that generating html in the model goes against the MVC. I didn't put it in a Controller because I didn't want to have database calls or HTML generation there. I didn't put it in a View because I didn't want database calls there either. Is the 'correct' way of tackling this problem to have a Controller call a recursive function in a Model that returns a 2d array representing the menu. Then pass the array to a view which has it's own recursive function for generating html from the array?

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• Can't add a .ldif to OpenLDAP, recent version (no slapd.conf)

  - by Biganon

  I'm new to LDAP and I'm trying to add the mmc.ldif and mail.ldif files that come with Mandriva Directory Server to my LDAP configuration, using the command : ldapadd -x -W -D "cn=admin,dc=biganon,dc=com" -f schema/mmc.ldif I then give the admin password I've set during slapd installation but get this error : ldap_bind: Invalid credentials (49) I have no slapd.conf file. I'm on Debian 6.0.1, OpenLDAP 2.4.23 Thank you

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• Writable folder by all users on the same pc

  - by Catalin DICU

  I have a desktop .NET WPF application witch uses an embedded database (SQLite). Where to put the database file ? It's the same database for all users. I tried to use CommonAppData but it's not writable by non-admin users. So I tried to use a custom installer action to give write rights to all users to this folder but it fails on domain PCs. The code is: DirectorySecurity security = Directory.GetAccessControl(appDataPath); FileSystemAccessRule rule = new FileSystemAccessRule("Users", FileSystemRights.WriteData, InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit, PropagationFlags.InheritOnly, AccessControlType.Allow); security.AddAccessRule(rule); Directory.SetAccessControl(appDataPath, security); Would ".\Users" insead of "Users" work on a domain ? Is this the best approach ? Is there any other folder I could use ?

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• Real pagination vs Next and Previous buttons

  - by Pablo

  By real pagination i mean something like this when in page 3: <<Previous 1 | 2 | {3} | 4 | 5 |...| 15 | Next>> By Next and Previous buttons i mean something like this when in page 3: <<previous Next>> Performance wise im sure the Previous and Next Buttons are better since unlike the real pagination it doesn't require over-querying the database. By over-querying the database i mean getting more information from the database than what you will need to display on the page. My theory is that the Previous and Next Buttons can drastically increase a site performance as it only requires the exact information you will need to display on a page, please correct me if im wrong on this. so, do users really have preference when it comes to this two options? is it just a Developer preference and its convenience? Which one do you prefer? why? *Note: Previous and Next Buttons are usually labeled Newer and older.

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• How do detect that transaction has already been started?

  - by xelurg

  I am using Zend_Db to insert some data inside a transaction. My function starts a transaction and then calls another method that also attempts to start a transaction and of course fails(I am using MySQL5). So, the question is - how do I detect that transaction has already been started? Here is a sample bit of code: try { Zend_Registry::get('database')->beginTransaction(); $totals = self::calculateTotals($Cart); $PaymentInstrument = new PaymentInstrument; $PaymentInstrument->create(); $PaymentInstrument->validate(); $PaymentInstrument->save(); Zend_Registry::get('database')->commit(); return true; } catch(Zend_Exception $e) { Bootstrap::$Log->err($e->getMessage()); Zend_Registry::get('database')->rollBack(); return false; } Inside PaymentInstrument::create there is another beginTransaction statement that produces the exception that says that transaction has already been started.

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• Is there a better way to do SELECT queries in MySQL and sort them in PHP than this way?

  - by Kent

  I am just learning PHP/MySQL, one this I am having to do a lot is displaying data that was previously inserted into the database out to the user's browser. So I am doing this: $select = mysql_query('SELECT * FROM pages'); while ($return = mysql_fetch_assoc($select)) { $title = $return['title']; $author = $return['author']; $content = $return['content']; } then I can use these variables through out the page. Now, doing it the above way isn't an issue when I only have 3 columns in a database but what if I am dealing with a huge database with many more columns. I have a nagging feeling that the pros do it in some more efficient way where they maybe loop through the table they are selecting from to find all columns it has and associate them with variables automatically. Is that the case? or is the above how you guys do it too?

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• Processing variable number of form fields

  - by a_m0d

  I am working on a form which displays information about orders. Each order has a unique id, but they are not necessarily sequential on the form. Also, the number of fields can vary (one field per row on the form). The input into the form will not be mapped straight into the database, but will be added to the current value in the database, and then saved. An example of the form is in the picture below - the callout on the right shows the id for each row. I know how to generate the form like this, but I can't work out how I can easily process each of these rows reliably. I also know how to give each of the fields a unique identifier, like name="row-23", but how can I translate that name so that I can update the related record in the database?

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• ShapeFile with Z Co-ordinates

  - by ace_mccloud

  I have 3 shapefiles, two of them wihtout the Z Co-ordinates elevation but 1 of them has a Z co-ordinate elevation. I can load two ShapeFiles into my SQL Server Database which does not have Z Co-ordinates. But I am having issue loading the Z Co-ordinate file into the database. I have been reading different forums and got a suggestion that I need to trim the Z coordinates(chnage 3D to 2D) to load into the database. I was just wondering how can I achieve this? Can anyone suggest free tools or any method to do the same? Cheers, Rushir

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• What is a good way of coding a file processing program, which accepts multisource data in Java

  - by jjepsuomi

  I'm making a data prosessing system, which currently is using csv-data as input and output form. In the future I might want to add support for example database-, xml-, etc. typed input and output forms. How should I desing my program so that it would be easy to add support for new type of data sources? Should simply make for example an abstract data class (which would contain the basic file prosessing methods) and then inherit this class for database, xml, etc. cases? Hope my question is clear =) In other words my question is: "How to desing a file prosessing system, which can be easily updated to accept input data from different sources (database, XML, Excel, etc.)".

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• Elegant way to add functionallity to previously defined functions

  - by Bastiaan

  How to combine two functions together I have a class controlling some hardware: class Heater() def set_power(self,dutycycle, period) ... def turn_on(self) ... def turn_off(self) And a class that connects to a database and handles all data logging fuctionallity for an experiment: class DataLogger() def __init__(self) # Record measurements and controls in a database def start(self,t) # Starts a new thread to aqcuire and reccord measuements every t secconds Now, in my program recipe.py I want to do something like: log = DataLogger() @DataLogger_decorator H1 = Heater() log.start(60) H1.set_power(10,100) H1.turn_on() sleep(10) H1.turn_off() etc Where all actions on H1 are recorded by the datalogger. I can change any of the classes involved, just looking for an elegant way to do this. Ideally the hardware functions remain separated from the database and DataLogger functions. And ideally the DataLogger is reusable for other controls and measurements.

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• Buffering db inserts in multithreaded program

  - by Winter

  I have a system which breaks a large taks into small tasks using about 30 threads as a time. As each individual thread finishes it persists its calculated results to the database. What I want to achieve is to have each thread pass its results to a new persisance class that will perform a type of double buffering and data persistance while running in its own thread. For example, after 100 threads have moved their data to the buffer the persistance class then the persistance class swaps the buffers and persists all 100 entries to the database. This would allow utilization of prepared statements and thus cut way down on the I/O between the program and the database. Is there a pattern or good example of this type of multithreading double buffering?

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• Free web gallery installation that can use existing directory hierarchy in filesystem?

  - by user1338062

  There are several different free software gallery projects (Gallery, Coppermine, etc), but as far as I know each of those creates a copy of imported images in their internal storage, be it directory structure or database). Is there any gallery software that would allow keeping existing directory hierarchy of media files (images, videos), as-is, and just store the meta-data of them in a database? I guess at least various NAS solutions ship with software like this.

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• creating a custom odbc driver for application

  - by neddy

  Ok, i have a simple database engine (its a proprietary product written in vb6) for one of my applications... i'd like to create an ODBC driver for it so i can use some of my other applications (which require a database) with my database engine rather than microsoft sql (which they are currently using).... Does anyone have any heads up on how to develop an ODBC driver (preferably in vb6) ... i'v spent the last few hours googling it and havnt had much luck... about the best thing i have found so far is: http://www.datadirect.com/products/openaccess/index.ssp but i dont exactly want to go buying an SDK to write an ODBC driver... Cheers in advance,

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• Why Does TFS Allow Orphaned Content and How Do I Get Rid of It?

  - by Chad

  My TfsVersionControl database has grown to 40+ GB in size. We recently did a TFS Destroy on a folder tree that should have cleared up at least 10 GB but instead it seemed to have no effect. When I look at the tables in TfsVersionControl, I am first shocked to see that there are no foreign keys at all in the database. Running a few queries, I see that there is some orphaning going on: tbl_Content has 13.9 GB of records that don't have a related tbl_File record tbl_File and tbl_Content have 2.4 GB that don't have a related tbl_Namespace record The cleanup job seems to be running nightly (prc_DeleteUnusedContent) and running it against the database manually doesn't remove any orphans. I see in the log for the cleanup job that it failed on 3/16, which is the morning after I destroyed the large amount of data. The error was due to a full transaction log. Could that error be the reason I'm left with all this orphaned data that can't be deleted? How can I permanently destroy this unneeded content?

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• ASP, My SQL & case sensitity suddenly broken

  - by user131812

  Hi There, We have an old ASPsite that has been working fine for years with a MY SQL database. All of a sudden last week lots fo SQL queries stopped working. The database has a table called 'members' but the code calls 'Members'. It appears the queries used to work regardless of case sensitivity on the table names, but something has changed recently somewhere to enforce case. This has me stumped as the site has not been touched in years, the server config hasn't changed & the database provide has not changed anything. Is there any simple way to ignore case for an ASP site (without editing lots fo files :) Thanks Ben

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• Can I write to different jetty databases using JPA that is using the same "entity class"

  - by Per

  I am using Java persistance and there EntityManager class and have it assigned to storage a class object that shall be written to the database. My problem is that I want to write to different databases using the same storage class. My solution to that was to write a StorageManagerfactory that has a Map holding all EntityManagers. The solution looked good until I looked at the databases and realized that all information (undepending of the Map, which gets the correct value) was written to the same database (one of the initialised in the Map). So my question is: Can I write to different databases using JPA that is using the same storage class (the class holding the structure of my database)? Thanks

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• wrong data type in mysql for grails byte[] property

  - by srkiNZ84

  Hi, I have an application which is trying to save a photo to the database. I've created a grails domain class with a byte[] property and this was working well when using HSQLDB (the default in grails). However, when I changed the database to MySQL I ended up getting the following error: Data truncation: Data too long for column 'photo' at row 1 I then had a look at the schema and found that the byte[] was being created as a TINYBLOB field, which was causing the error. How can I specify that this property should correspond to a BLOB/LONGBLOB type in the database?

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• Constructing an if, if else, else statement

  - by Luke

  /* Errors exist, have user correct them */ if($form->num_errors > 0) { return 1; //Errors with form } /* No errors, add the new account to the */ else if($database->addLeagueInformation($subname, $subformat, $subgame, $subseason, $subwindow, $subadmin, $subchampion, $subtype)) { $database->addLeagueTable(); $_SESSION['players'] == $subplayers; $comp_name == '$format_$game_$name_$season'; $_SESSION['comp_name'] == $comp_name; return 0; //New user added succesfully } else { return 2; //Registration attempt failed } At the moment this isn't doing any of these things\: $database->addLeagueTable(); $_SESSION['players'] == $subplayers; $comp_name == '$format_$game_$name_$season'; $_SESSION['comp_name'] == $comp_name; Is there a better way to do this?

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• Simple RIA backend

  - by Jeremy

  I'm creating a prototype for a java web application. Frontend is a Swing-based java applet. Backend should be a type of web-service, that is called by applet. Backend should run inside a servlet container and should have its own security (username/password) database. I know, that Tomcat has its own user database (realm), but the app should have own. Web-services, in turn, carrying out app logic and database access (via Hibernate). I'm a newbie for a web development and I'm getting lost in a huge amount of the java web frameworks. Even just reading 'introduction' and 'getting started' documents takes a lot of time. So I need an advice which framework(s) are suitable for the task and not very complex for a quick start. Thank you

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• How to analyse Wikipedia article's data base with R?

  - by Tal Galili

  Hi all, This is a "big" question, that I don't know how to start, so I hope some of you can give me a direction. And if this is not a "good" question, I will close the thread with an apology. I wish to go through the database of Wikipedia (let's say the English one), and do statistics. For example, I am interested in how many active editors (which should be defined) Wikipedia had at each point of time (let's say in the last 2 years). I don't know how to build such a database, how to access it, how to know which types of data it has and so on. So my questions are: What tools do I need for this (besides basic R) ? MySQL on my computer? RODBC database connection? How do you start planning for such a project?

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• Design guidelines for cache mechanism

  - by Delashmate

  Hi All, I got assignment to write design for cache mechanism (this is work assignment, not homework), This is my first time writing a design document, Our program display images for doctors, and we want to reduce the parsing time of the images So we want to save the parsed data in advance (in files or inside database) Currently I have several design key ideas: Handle locks - each shared data structure should be handled, also files Test - add test to verify the data from the cache is equal to the data from the files To decouple the connection to the database- not to call directly to the database Cleanup mechanisem- to delete old files if the cahce directory exceed configurable threshold Support config file Support performance tool in the feature I will also add class diagram, data flow charts, and workflow What do you think I should add to the key ideas? Do you know good link to atricales about design? Thanks in advance, Dan

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• How to make sure no scripts except those under my own domain, can include the db connection file?

  - by Jack

  I would like to ensure that any scripts that are trying to "include" my database connection file are located under my own domain. I don't want a hacker to include the database connection file to their malicious script and gain access to my database that way. My connection file's name is pretty easy to guess, it's called "connect.php". So without renaming it and taking the security through obscurity route, how can I protect it by making sure all connection requests are made by scripts residing under my own domain name? How can this be checked using PHP?

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• List of all CREATE operations I made on level of phpMyAdmin or MySQL (PostgreSQL)

  - by dynback.com

  When I am doing something in a schema of tables I want to have a list of changes to put in svn, and execute it by another members of the team. As I understand, there are 2 ways: extract from logs, or implant some code inside phpMyAdmin, maybe there are other ways without coding?

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• Error OEM (oracle Enterprise Manager)

  - by user137520

  Dear Friends I was trying to configure OEM today. Everything seemed fine. I could login the OEM but when I tried to lauch DBA studio from there, I could not and it said no database has been discovered yet. I don't understand why since I created a database already. Has anyone experienced that? Thank You

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• Netbeans mySQL Connection error

  - by user125469

  Hi everybody I'm new and I'm having some trouble with a connection with netbeans and mysql, I need a database online I created one at 000webhost.com but I think that something's wrong .... if any have some idea or other server I really need to connect a database from a server online with an app in netbeans... Please I'm new in this all ideas you have come on.. here it's a pic http://i.stack.imgur.com/KA8iS.png http://s2.subirimagenes.com/imagen/7786594fail.png

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