I have deleted a column from a table in SQL Server and then I went on to do the same on EF Diagram by right click on the column and then choosing 'Delete from model'.
All of my entities went missing then!
Is there any reason for this and what can I do to restore ..
Thanks.
Related
I'm trying to integrate my Oracle Database into my ASP.NET app, but I keep getting this error :
Error 2002: The EntityContainer 'OracleDBTargetContainer' for the
storage model specified as part of this MSL does not exist in
MetadataWorkspace.
I've tried everything I could think of but still can't figure out what's wrong.
What can I do to diagnose the root cause of this?
This is still new to me so I might miss something very obvious.
I'm assuming it my not like my database as the Diagram displayed when I integrated another DB. I've checked the foreign keys, primary keys, ... but to no good.
Using VS2013 with ODP.NET 12c Release 3.
EDIT : My EntityContainerMapping is empty, is that normal?
<EntityContainerMapping CdmEntityContainer="PMModelContainer" StorageEntityContainer="PMModelTargetContainer"></EntityContainerMapping>
I found what was wrong.
One of my foreign key didn't match the primary key (Number 20 instead of Number 10)
I saw on stack overflow that it could be a problem and checked my tables but I missed that one obviously.
How did I realize it ? Well because rather than creating the EF Designer, I chose the Code First from database option, and, oh, what do you know, the error message now tells you EXACTLY what the problem is ! (Table names and columns).
Using Visual studio 2013 we are using the edmx feature to build the model based on the database.
Unfortunately when we update the model from the database some of the fields seem to have the number 1 added to their name.
For example the table in the database looks like this
But the model in visual studio is being created like this
How can I stop it adding the number 1 after the field name? This is happening in more than one table too.
I have tried regenerating the table on its own or the entire database and its not making any difference.
Ok so I think I have found out what the reason is.
If any of the tables in my database have the same name as the field name is where this issue is happening.
If you change the field name in the database then it should be fine. e.g the the example above change the field name from ClientTitle to ClientTitleName.
I have this error: "1007 entity is not mapped" So I look in my edmx file and when I click "Validate", sure enough it says my two tables are not mapped to the database.
So I followed this: http://msdn.microsoft.com/en-us/library/bb738478%28v=vs.103%29.aspx to map entities to DB tables that already exist, but when I get to step 2, my drop list is empty instead of what their direction says: "The field becomes a drop-down list that contains all the tables in the storage model that are not already included in the current mapping."
Article provides no comments on how to fix it if it's empty. Good ole MSDN! I haven't found anything online either so far.
Anyone know this one?
I'm trying to get our current database to use FTS. I recompiled the project with FTS3 and FTS4 support on. I know this part works since I've tried some of the examples off of the sqlite pages and they work.
e.g.
CREATE TABLE t2(id INTEGER PRIMARY KEY, a, b, c);
CREATE VIRTUAL TABLE t3 USING fts4(content="t2", a, c);
What I want to do is add a Virtual table to a .db that is already saved to the documents directory of our app. It is writeable.
My question is multi part. First, I tried my query in Firefox's add-on SQLite manager. My query is this:
CREATE VIRTUAL TABLE VirtualTestTable USING fts4(content=Chromosomes, ID Integer Primary Key Autoincrement, rsID, ChrID, Position, Strand, GeneSymbol)
Once I run this in sqlite manager, it creates a few different tables (VirtualTestTable, VirtualTestTable_docsize, VirtualTestTable_segdir, VirtualTestTable_segments, VirtualTestTable_stat).
So I assume sqlite manager supports FTS4. My table is also populated with the data that was original in my Chromosomes Table. But when I try to match anything in the table, I always get zero results. So my first question is, does sqlite manager support FTS queries?
My other question, which is more important to me, is if my query works in sqlite manager, I try this query in my Xcode project with different variations of
content='Chromosomes'
content=\"Chromosomes\"
content=Chromosomes
I always get an error with my query. I'm using FMDB and using the executeUpdate: message. My error is:
Error calling sqlite3_step (1: SQL logic error or missing database) SQLITE_ERROR
Unknown error finalizing or resetting statement (1: unrecognized parameter: content=Chromosomes)
Does anyone know why I'm getting this error? I don't think it's a missing database as when I try to just create an empty Virtual table on my fmdatabase, it runs fine. Thanks.
FTS queries work just fine in SQL Manager:
CREATE VIRTUAL TABLE t USING FTS4(x);
INSERT INTO t VALUES('blah');
INSERT INTO t VALUES('blubb');
SELECT * FROM t WHERE x MATCH 'bl*';
The error message "unrecognized parameter: content=" is typical for SQLite versions that do not support contentless/external content tables, i.e., ones older than 3.7.11.
I'm using Firebird 2.5.0 with the Entity Framework, which has been working well. However, recently I have changed something (I presume) and now the SQL that is being generated when I try to save my changes is not valid for Firebird:
update ( select [fields] from [table]) set [field] = #p0 where ([keyfieldn = #pn])
As far as I know, Firebird 2.5.0 does not support this syntax, and when I try to save changes I get back a SQL error that says as much ( "Token unknown, column 8: (" )
I'm not sure what to do now. What would cause the UpdateTranslator instance to generate this SQL instead of whatever it must have been generating before I broke it?
I went back through the edmx file and found that I had gotten some 'DefiningQuery' elements when I had it pull in some new fields from the database. I couldn't find any way to access those settings in the interface, so I just deleted them from the file and it is working correctly again.