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  • mapping Field with variable type using Hibernate Annotaion

    - by Zahra
    Hi. how can I have a field with variable type in my class? I use hibernate annotation for mapping to DB. I tried to use java.io.Serializable as field's type, but it mapped to database as a 01 amount which is true if I get it's object and cast it to it's true type. but I need to run a query on this objects that needs true amount of field.(right now I can't compare an integer field with a number) Does anyone have any idea how can I do this? Thanks in advance.

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  • Java ResultSet how to getTimeStamp in UTC

    - by mkal
    The database has data in UTC and when I try to get data java.util.Calendar cal = Calendar.getInstance(); cal.setTimeZone(TimeZone.getTimeZone("UTC")); java.sql.Timestamp ts = resultSet.getTimestamp(PUBLISH_TIME); cal.setTime(ts); Is there anything wrong with this?

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  • How to replicate CoreData NSFetchedResultController with plain SQLite?

    - by jchatard
    I would like to replicate the notification sort of system provided with CoreData NSFetchedResultController which with really little enables us to update a tableView based on events such as Insert/Update/Delete of objects represented as Cells. I'm currently using SQLitePersistentObjects as a Database abstraction layer: http://code.google.com/p/sqlitepersistentobjects/ If you have any idea or something working or at least advices I'd be very happy! Thank you!

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  • how to display fixed dropdown in django admin?

    - by FurtiveFelon
    Hi all, I would like to display priority information in a drop down. Currently i am using a integer field to store the priority, but i would like to display high/medium/low instead of letting user type in a priority. A way to approximate this is to use a Priority database which stores 3 elements, 1:high, 2:medium, 3:low, but it seems like an overkill. Any easier way would be much appreciated! Jason

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  • finding process bottlenecks rails/ruby

    - by Ben
    I just got started with rails, and when I testing in development mode, I see in the logs that my Mailer action is taking 1175ms. Is there anyway to find out what exactly is the slow step? Also, there is a line that says (View:2, DB:1). I assume the DB means number of database lookups, but what about the view?

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  • Can I have a user submit a form and receive a PDF copy?

    - by thatryan
    Not quite sure how to ask this :) But what I need is to have some forms online that people can fill out, like registration form etc. They will then submit it and be emailed it as well as me and have it stored in a database. Is there a way for the files to be PDFs? Can I have an editable PDF form online? Thank you.

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  • mysqldump command not working?

    - by Harish Kurup
    I am using mysqldump to take backup of my database, but the command is not working.. the command i am using is mysqldump -u root dbname> 'c:\backupdatafolder\backup.sql' i am running this command in MySQL cli but not running,..is there any thing wrong in the command?

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  • GNU GPL - access to data?

    - by Ke
    Hi, I realise that modified versions of the software should be freely available, but what about the content that is held within a mysql database for instance? does that have to be available too? Cheers ke

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  • insert number of days of year, months, days of month

    - by ml
    How can I insert in a database the number of days of the year and at the same time insert in the same record the month, day of the month, and the day of the week? This is my table: tabela/coluna.Dias_ano(registo 1...365) Year:=StrToInt(ano.Text); diasano.Text:= IntToStr( DaysInAYear(Year) ); diasAno| Mes |diames |dia semana | 1 | janeiro | 1 |Segunda | 2 | janeiro | 2 | Terça | ... 365 | Dezembro | 31 | Segunda

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  • Are Multi-column Primary Keys in MySQL a optimisation problem?

    - by David
    Been looking into using multi-column primary keys and as performance is extremely important with the size of traffic and database I need to know if there is anything to consider before I start throwing out the unique ID method on many of my tables and start using mulit column primary keys. So, what are the performance/optimisation pros/cons to using multi column primary keys versus a basic single column, auto-inc primary key?

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  • N2Cms, Adding a new property to a ContentPageBase class, corrupts the already entered data.

    - by Nour Sabouny
    i want to modify the ContentPageBase, in a functional site, i tried to add a property called for example (weight), but if there is an existing page in the database, the site will malfunction, and throws an Exception, of (Object reference not set to an instance of an object). how can i correct the already entered data ? public abstract class ContentPageBase : PageBase, ICommentable { [EditableTextBox("Weight", 10, ContainerName = Tabs.Details)] //newly added property. public virtual int Weight { get { return (int)GetDetail("Weight"); } set { SetDetail("Weight", value); } } }

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  • Implementing a scalable and high-performing web app

    - by Christopher McCann
    I have asked a few questions on here before about various things relating to this but this is more of a consolidation question as I would like to check I have got the gist of everything. I am in the middle of developing a social media web app and although I have a lot of experience coding in Java and in PHP I am trying things a bit different this time. I have modularised each component of the application. So for example one component of the application allows users to private message each other and I have split this off into its own private messaging service. I have also created a user data service the purpose of which is to return data about the user for example their name, address, age etc etc from the database. Their is also another service, the friends service, which will work off the neo4j database to create a social graph. My reason for doing all this is to allow me up to update seperate modules when I need to - so while they mostly all run off MySQL right now I could move one to Cassandra later if I thought it approriate. The actual code of the web app is really just used for the final construction. The modules behind it dont really follow any strict REST or SOAP protocol. Basically each method on our API is turned into a PHP procedural script. This then may make calls to other back-end code which tends to be OO. The web app makes CURL requests to these pages and POSTs data to them or GETs data from them. These pages then return JSON where data is required. I'm still a little mixed up about how I actually identify which user is logged in at that moment. Do I just use sessions for that? Like if we called the get-messages.php script which equates to the getMessages() method for that user - returning all the private messages for that user - how would the back-end code know which user it is as posting the users ID to the script would not be secure. Anyone could do that and get all the messages. So I thought I would use sessions for it. Am I correct on this? Can anyone spot any other problems with what I am doing here? Thanks

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  • What is the preferred method of refreshing a combo box when the data changes?

    - by Craig Johnston
    What is the preferred method of refreshing a combo box when the data changes? If a form is open and the combo box data is already loaded, how do you refresh the contents of the combo box without the form having to be closed and reloaded? Do you have to do something on the Click event on the combo box? This would seem to be a potential slow down for the app if there is a hit to the database every time someone clicks on a combo box.

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  • How do I empty Drupal Cache (without Devel)

    - by alexanderpas
    Okay... Seems i can't find it with google... so here you go SO ;) How do i empty the drupal caches: without the Devel module without running some PHP Statement in a new node etc. without going into the database itself Effectively, how do you instruct a luser to clear his caches

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  • Restricting Access in ERB code.

    - by LGFaler
    I am trying to build a CMS using ERB. Is there a way you can give ERB code read-only access to your models? For instance, I want to be able to load any information on my models (Model.all, Model.find_by_slug, Model.find_by_name, Model.other_model.name, etc...), but I don't want to be able to change this data. Can you disable ERB from executing commands that would make database changes (Model.save, Model.update, Model.delete, Model.destroy, etc.)???

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  • sql CE 3.5 pros and cons

    - by Buzz
    Hi, Currently we are using xml files as local data store for our disconnected application, there is proposal to move to SQL CE database. Can some one with experience of SQL CE provide some pros and cons of using sql compact, for example data type support etc. As Central DB server we are using SQL Server2005. One of the requirement is to merge local store with central DB, and we don't want any data loss. Thanks

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  • mysqli real_escape_string problem

    - by tridat
    When im inserting to the database on my dev server the text goes in fine, for example "that's" is "that's" in the db. when uploading the exact same code to production server (hosted on a reseller account at bluehost) "that's" becomes "that\'s", im not double escaping, its exactly the same code, what could be the issue here?

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  • What's a good PHP Active Record library?

    - by Luca Matteis
    I've been using CodeIgniter for some quite time, and I've been extremely happy with its Active Record stuff. It's great to query the database with it. Recently I've started a new project and I can't use such a framework anymore. Is there a simple PHP Active Record library that does its job and gets out of the way (similar to CodeIgniter's version)?

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