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  • django views question

    - by Hulk
    In my django views i have the following def create(request): query=header.objects.filter(id=a)[0] a=query.criteria_set.all() logging.debug(a.details) I get an error saying 'QuerySet' object has no attribute 'details' in the debug statement .What is this error and what should be the correct statemnt to query this.And the model corresponding to this is as follows where as the models has the following: class header(models.Model): title = models.CharField(max_length = 255) created_by = models.CharField(max_length = 255) def __unicode__(self): return self.id() class criteria(models.Model): details = models.CharField(max_length = 255) headerid = models.ForeignKey(header) def __unicode__(self): return self.id() Thanks..

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  • SyncFramework upgrade from 1.0 to 2.0 Sql Server CE database change tracking issue

    - by Andronicus
    I'm trying to upgrade an application that uses Sync Framework 1.0 to synchronise a SqlServerCe database with SqlServer 2005. On the client, the existing database already has change tracking enabled, but when the sync is initiated SyncFramework 2.0 fails to find the last Sync Received anchor and then tries to re=initialize the Change tracking, which fails. I get the exception... {System.Exception} = {"The specified change tracking operation is not supported. To carry out this operation on the table, disable the change tracking on the table, and enable the change tracking."} It seems like all I can do is delete the local database and recreate it. Which is not a great solution for us, since some of the data in the clients database is not synced with the server, and our users would prefer not to loose this data in the upgrade. Is there any reason why SyncFramework 2.0 cannot locate the existing Last received sync anchor?

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  • Copying contents of a model

    - by Hulk
    If there exists an old data of a model say , query=Emp.objects.filter(pk=profile.id) Is there a easier way to copy the same values into the same model again.. Now that the id will be different so.. I have this requirement. Thanks..

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  • Microsoft Sync Framework with Mutliple Client and Server Database

    - by David Osborn
    I'm working on changes to an application to have a local data store instead of connecting directly to the database server. The client app will then sync changes both ways between the server database and its local data store. I'm trying to implement the syncing solution using Microsoft Sync Framework. To be clear there is no server application, only the database server, but there are multiple clients. I have started implementing two classes that implement FullEnumerationSimpleSyncProvider, one called LocalSyncProvider and one called ServerSyncProvider. The LocalSyncProvider knows how to enumerate, insert, update, delete items from the local data store, and the ServerSyncProvider knows how to enumerate, insert, update, delete items from the database server. They each use the provided SqlMetadataStore and store the two metadata stores (one for the local and one for the server) on the local drive of the client. This means that each client will have its own metadata store for its local data store and its own metadata store for the server database. Is this actually going to work, does there need to exists only one server metadata store, or do I need to be using the Sync Framework differently?

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  • Android: problem retrieving bitmap from database

    - by Addy
    When I'm retrieving image from the sqlite database my Bitmap object bm return null value can any one help me..? I found problem in my database.. When I store the byte array in blob data type in database table that time the size of the byte array was 2280.. But when i retrieved that blob data type using select query I get the byte array within size 12. My code is: // Inserting data in database byte[] b; ByteArrayOutputStream baos = new ByteArrayOutputStream(); Bitmap bm = BitmapFactory.decodeResource(getResources(),R.drawable.icon); bm.compress(Bitmap.CompressFormat.PNG, 100, baos); //bm is the bitmap object b = baos.toByteArray(); //here b size is 2280 baos.close(); try { mDB = this.openOrCreateDatabase(MY_DATABASE_NAME, MODE_PRIVATE, null); mDB.execSQL("CREATE TABLE IF NOT EXISTS " + MY_DATABASE_TABLE + " (PICTURE BLOB);"); mDB.execSQL("INSERT INTO " + MY_DATABASE_TABLE + " (PICTURE)" + " VALUES ('"+b+"');"); } catch(Exception e) { Log.e("Error", "Error", e); } finally { if(mDB != null) mDB.close(); } // Retriving data from database byte[] b1; Bitmap bm; mDB = this.openOrCreateDatabase(MY_DATABASE_NAME, MODE_PRIVATE, null); try { mDB.execSQL("CREATE TABLE IF NOT EXISTS " + MY_DATABASE_TABLE + " (PICTURE BLOB);"); Cursor c = mDB.rawQuery("SELECT * FROM " + MY_DATABASE_TABLE + ";", null); c.moveToFirst(); if (c != null) { do { b1=c.getBlob(0)); //here b1 size is 12 bm=BitmapFactory.decodeByteArray(b1, 0, b1.length); }while(c.moveToNext()); }

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  • Using C# and Repository Factory and the error: The requested database is not defined in configurati

    - by odiseh
    hi I am using Repository factory for visual studio 2008 for a personal project. It generated a class called ProductRepository which inherits from Repository. The ProductRepository has a constructor which gets a database name as string and passes it to its base (I mean Repository ). So when I try to debug my project step by step, I pass my database name to ProductRepository but it raises the following error: The requested database is not defined in configuration. What's wrong?

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  • How to select from tableA sum of grouped numbers from tableB above their sums average in Oracle?

    - by Nazgulled
    I have data like this: tableA.ID --------- 1 2 3 tableB.ID tableB.NUM -------------------- 1 10 1 15 2 18 3 12 2 15 3 13 1 12 I need to select tableA IDs where the sum of their NUMs in tableB is above the average of all tableA IDs sums. In other words: SUM ID=1 -> 10+15+12 = 37 SUM ID=2 -> 18+12+15 = 45 SUM ID=3 -> 12+13 = 25 AVG ALL IDs -> (37+45+25)/3 = 35 The SELECT must only show ID 1 and 2 because 37 35, 45 35 but 25 < 35. This is my current query which is working fine: SELECT tableA.ID FROM tableA, tableB WHERE tableA.ID = tableB.ID HAVING SUM(tableB.NUM) > ( SELECT AVG(MY_SUM) FROM ( SELECT SUM(tableB.NUM) MY_SUM FROM tableA, tableB WHERE tableA.ID = tableB.ID GROUP BY tableA.ID ) ) GROUP BY tableA.ID But I have a feeling there might be a better way without all those nested SELECTs. Perhaps 2, but 3 feels like too much. I'm probably wrong though. For instance, why can't I do something simple like this: SELECT tableA.ID FROM tableA, tableB WHERE tableA.ID = tableB.ID HAVING SUM(tableB.NUM) > AVG(SUM(tableB.NUM)) GROUP BY tableA.ID Or this: SELECT tableA.ID, SUM(tableB.NUM) MY_SUM FROM tableA, tableB WHERE tableA.ID = tableB.ID HAVING MY_SUM > AVG(MY_SUM) GROUP BY tableA.ID

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  • Copying contents of a module

    - by Hulk
    If there exists an old data of a model say , query=Emp.objects.filter(pk=profile.id) Is there a easier way to copy the same values into the same model again.. Now that the id will be different so.. I have this requirement. Thanks..

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  • Django filter vs exclude

    - by Enrico
    Is there a difference between filter and exclude in django? If I have self.get_query_set().filter(modelField=x) and I want to add another criteria, is there a meaningful difference between to following two lines of code? self.get_query_set().filter(user__isnull=False, modelField=x) self.get_query_set().filter(modelField=x).exclude(user__isnull=True) is one considered better practice or are they the same in both function and performance?

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  • Relational database question with php.

    - by Oliver Bayes-Shelton
    Hi, Not really a coding question more a little help with my idea of a Relational database. If I have 3 tables in a SQL database. In my php script I basically query the companies which are in industry "a" and then insert a row into a separate table with their details such as companyId , companyName etc is that a type of Relational database ? I have explained it in a simple way so we don't get confused what I am trying to say.

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  • Web framework for an application utilizing existing database?

    - by tputkonen
    A legacy web application written using PHP and utilizing MySql database needs to be rewritten completely. However, the existing database structure must not be changed at all. I'm looking for suggestions on which framework would be most suitable for this task? Language candidates are Python, PHP, Ruby and Java. According to many sources it might be challenging to utilize rails effectively with existing database. Also I have not found a way to automatically generate models out of the database. With Django it's very easy to generate models automatically. However I'd appreciate first hand experience on its suitability to work with legacy DBs. Also I appreciate suggestions of other frameworks worth considering.

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  • Django select distinct sum

    - by yoshi
    I have the following (greatly simplified) table structure: Order: order_number = CharField order_invoice_number = CharField order_invoice_value = CharField An invoice number can be identical on more than one order (order O1 has invoice number I1, order O2 has invoice number I1, etc.). All the orders with the same invoice number have the same invoice value. For example: Order no. Invoice no. Value O1 I1 200 O2 I1 200 O3 I1 200 04 I2 50 05 I2 100 What I am trying to do is do a sum over all the invoice values, but don't add the invoices with the same number more than once. The sum for the above items would be: 200+50+100. I tried doing this using s = orders.values('order_invoice_id').annotate(total=Sum('order_invoice_value')).order_by() and s = orders.values('order_invoice_id').order_by().annotate(total=Sum('order_invoice_value')) but I didn't get the desired result. I tried a few different solutions from similar questions around here but I couldn't get the desired result. I can't figure out what I'm doing wrong and what I actually should do to get a sum that uses each invoice value just once.

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  • Connect Access 2007 to SQL Server 2008 Database

    - by Peter
    Hi, I've seen numerous answers to similar questions like this one. I haven't seen on the web many people have asked the seemingly simple question "How do I connect Access 2007 to an SQL server 2008 database" - but all of the answers describe how you can migrate from access 2007 to an sql server 2008 database, or they describe how to connect access 2007 to an sql server 2005 database. I can't find any simple solution to my problem (and probably this is a problem for many others). Here is the question (sorry for the over emphasis): How do I connect to an sql server 2008 database (and I mean 2008, not 2005 :) ) from access 2007? Apologies again for the over emphasis, but this very simple question, and what I thought should be a very simple task seems, yes, ... impossible! I tried running sql server browser, enabling pipes, TCP etc, but it seems that with 2008 SQLEXPRESS just isn't recognised! Please can someone help with this. Peter

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  • Relational database queestion with php.

    - by Oliver Bayes-Shelton
    Hi, Not really a coding question more a little help with my idea of a Relational database. If I have 3 tables in a SQL database. In my php script I basically query the companies which are in industry "a" and then insert a row into a seperate table with their details such as companyId , companyName etc is that a type of Relational database ? I have explained it in a simple way so we don't get confused what I am trying to say.

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  • What is Ad Hoc Query?

    - by zihado
    Recently, I'm reading a book about SQL. In that book, I can't understand this term - Ad Hoc Query. I want to know what is exactly means "Ad Hoc Query" Help me, plz. Thanks in advance.

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  • Using a datanase class in my user class?

    - by Josh
    In my project I have a database class that I use to handle all the MySQL stuff. It connects to a database, runs queries, catches errors and closes the connection. Now I need to create a members area on my site, and I was going to build a users class that would handle registration, logging in, password/username changes/resets and logging out. In this users class I need to use MySQL for obvious reasons... which is what my database class was made for. But I'm confused as to how I would use my database class in my users class. Would I want to create a new database object for my user class and then have it close whenever a method in that class is finished? Or do I somehow make a 'global' database class that can be used throughout my entire script (if this is the case I need help with that, no idea what to do there.) Thanks for any feedback you can give me.

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  • Django updating db for selected ids

    - by Hulk
    In the following, New row values in DB are 6,8.They are the ids of a field I want to update these some other fields in the table based on these values row_newid=request.POST.get('row_updated_id') //Array row_newdata=request.POST.get('row_updated_data') //Array for newrow in row_newid: //how to update row_newdata for newrow values No for all the ids in row_newid how do i update row_newdata. row_newdata has the values 'a' and 'b' for example. thanks....

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  • Lightweight Object->Database in python

    - by pehrs
    I am in need of a lightweight way to store dictionaries of data into a database. What I need is something that: Creates a database table from a simple type description (int, float, datetime etc) Takes a dictionary object and inserts it into the database (including handling datetime objects!) If possible: Can handle basic references, so the dictionary can reference other tables I would prefer something that doesn't do a lot of magic. I just need an easy way to setup and get data into an SQL database. What would you suggest? There seems to be a lot of ORM software around, but I find it hard to evaluate them.

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  • Django foreign key error

    - by Hulk
    In models the code is as, class header(models.Model): title = models.CharField(max_length = 255) created_by = models.CharField(max_length = 255) def __unicode__(self): return self.id() class criteria(models.Model): details = models.CharField(max_length = 255) headerid = models.ForeignKey(header) def __unicode__(self): return self.id() In views, p_l=header.objects.filter(id=rid) for rows in row_data: row_query =criteria(details=rows,headerid=p_l) row_query.save() In row_query =criteria(details=rows,headerid=p_l) there is an error saying 'long' object is not callable in models.py in __unicode__, What is wrong in the code Thanks..

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  • OLEDB connection to Access database using DSN

    - by somu
    Hai i want oledb connection using Dsn. I used the following code 'Dsn Create dbRegBase.RegisterDatabase("GEMINI", "Microsoft Access Driver (*.mdb)", True,DBQ=D:\Gemini\GEMINI\database\paints_01_2008-2009.mdb Description=Greenchip Technologies ODBC Database File Path OemToAnsi=No UID=admin PWD=XXXXXX conection code Provider=Microsoft.Jet.OLEDB.4.0;DBQ ='GEMINI';Persist Security Info=False;Jet OleDB:Database Password = XXXXXX But Error come error name is "Could not find installable ISAM" what i do . please tell me.

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  • Using a .MDF SQL Server Database with ASP.NET Versus Using SQL Server

    - by Maxim Z.
    I'm currently writing a website in ASP.NET MVC, and my database (which doesn't have any data in it yet, it only has the correct tables) uses SQL Server 2008, which I have installed on my development machine. I connect to the database out of my application by using the Server Explorer, followed by LINQ to SQL mapping. Once I finish developing the site, I will move it over to my hosting service, which is a virtual hosting plan. I'm concerned about whether using the SQL Server setup that is currently working on my development machine will be hard to do on the production server, as I'll have to import all the database tables through the hosting control panel. I've noticed that it is possible to create a SQL Server database from inside Visual Studio. It is then stored in the App_Data directory. My questions are the following: Does it make sense to move my SQL Server DB out of SQL Server and into the App_Data directory as an .mdf file? If so, how can I move it? I believe this is called the Detach command, is it not? Are there any performance/security issues that can occur with a .mdf file like this? Would my intended setup work OK with a typical virtual hosting plan? I'm hoping that the .mdf database won't count against the limited number of SQL Server databases that can be created with my plan. I hope this question isn't too broad. Thanks in advance! Note: I'm just starting out with ASP.NET MVC and all this, so I might be completely misunderstanding how this is supposed to work.

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  • C# integer primary key generation using Entity Framework with local database file (Sdf)

    - by Ronny
    Hello, I'm writing a standalone application and I thought using Entity Framework to store my data. At the moment the application is small so I can use a local database file to get started. The thing is that the local database file doesn't have the ability to auto generate integer primary keys as SQL Server does. Any suggestions how to manage primary keys for entities in a local database file that will be compatible with SQL Server in the future? Thanks, Ronny

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  • Access Database using do.cmd openform where clasue - returning all values

    - by primus285
    DoCmd.OpenForm "Database Search", acFormDS, , srcLastName & "AND " & srcFirstName This is only a small sample of the where clause - there are many more terms. First, there is a set of If, Then type tings up top that set the variable srcLastName and srcFirstName to some value. These are not the problem and work just fine. The trouble is getting them to return all values (for instance if you only want to search by one, on neither(return full database list)) Thus far I have settled for (in the if then section): srcLastName = "[Lastname] =" & Chr(34) & cboLastName & Chr(34) - to search for something and srcLastName = "[Lastname] <" & Chr(34) & "Nuthin" & Chr(34) - to return everything (not equal to an absurd and mispelled database term.) The trouble is that data that is null is also not returned. If I have a null firstname, it will not show up in any search period. is there a term I can set [lastname] and [firstname] equal to that will return EVERYTHING (null, open, data, numbers, wierd stuff and otherwise) in a search an SQL form of "give me everything shes got scotty" if you will. the real issue here comes from the data entry - if I could just know that the people would enter everything 100% of the time, this code would work. but forget to enter the persons age or whatever, and it wont return that entry. So far, the only other solution I have come up with is to put a counter in each if then statement. The count will go up by one for each thing that is being searched by. Then if the count is = 1, then I can search by something like just DoCmd.OpenForm "Database Search", acFormDS, , srcLastName or DoCmd.OpenForm "Database Search", acFormDS, , srcFirstName then revert back to the DoCmd.OpenForm "Database Search", acFormDS, , srcLastName & "AND " & srcFirstName when the count is 2 or more truoble here is that it only works for one (unless I so wanted to create a custon list of 2 combined, 3 combined, 4 combined, but that is not happening)

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