I'm creating a DMF to populate the AX Standard Table SmmSalesUnit.
But when I launch the standard AX Wizard to create a DMF Iget an error To a foreign key constraint it is only possible to add a constraint related to fixed field
I have this standard relation and this
How can I by-pass the problem?
Thanks,
Enjoy.
It is a bug in the data import/export framework. As a workaround you can comment the following line in method generate of class DMFGenerateEntityTable and uncomment it after generation
Related
While using flyway.clean() -
I get the following error:
Message : SAP DBTech JDBC: [417]: can't drop without CASCADE
specification: cannot drop table referenced by foreign key.
Is there a way to make Flyway cascade drop all objects?
This sounds like a bug. Please file an issue in the issue tracker including the smallest possible bit of SQL that triggers this.
If you want to drop tables that have foreign key constraints on SAP HANA you either have to drop those constraints before or you have to specify the CASCADE command option.
This is documented in the SAP HANA SQL reference guide.
Note, that CASCADE will drop all dependent objects, not just constraints.
I have an oracle database connected to ASP.net MVC 5 with entity framework 6 application, all things was going well, until i made a change (add a new column) in bridge table:
the table:
my constraint on table :
Sample of data:
Error::
Severity Code Description Project File Line Suppression State
Error Error 3025: Problem in mapping fragments starting at line 4758:Must specify mapping for all key properties (DECC_TAB_SUB.TAB_ID, DECC_TAB_SUB.PARENT_TAB_ID, DECC_TAB_SUB.STEPROLE_ID) of table DECC_TAB_SUB. DECC.EntityModel
and here's the table in diagram
and here's the association
, I have made many searches but unfortunately i didn't find anything helps me.
When using code first i have this scenario:
I have an existing database where tables are created with Code first.
Know suddenly there needs to be a change in the program and there is a new table that is related to the Primary table (with existing data in it).
Example there is a table "Package" and a the new table is "PackageState"
Steps
Create new domain Packagestate with some properties.
Add property packagestate (FK) in Package domain.(P) Note that the packagestate is required.
In the seeding class i add some data for the packagestate
From this point i have a problem, because the value is required, and the seeding method is only executed after update.
How do you solve this with code first?
Because it's possible that there is a new migration file as well.
I need some feedback on this thanks in advance!
You must make your foreign key nullable and update your database
after that you can run your seed.
and after all you should change your foreign key to not null.
I am using asp.net 4.5 with EF to add/update/delete record.
I renamed a database table StatusMaster to Status.
To reflect this change in entity, I have used "update model from database" in which I have deleted the table first.
Then I have deleted the table from the diagram using "Delete Model".
Then I added table to the edmx file using "Update Model from Database".
I also have update related code in application.
Now Add() method is working well but while update method it gives me error "Invalid column name 'Id'". This column was the primary key before I update but I have also renamed it to "StatusId" but I don't think it should affect it because I already have deleted and added the table using "Update model from database".
Please help me.
All the more reason I prefer code first. More work to set up but easier to make changes down the line. Ill suggest you do the following.
Delete the entire EDMX
Delete Connection Details from config section in Web.config
Re-Create EDMX
I discovered that is faster that trying to debug ur relationship in the EDMX diagram
I'm learning migrations and I'm curious how migration tool figures out which changes to our model were made after the last migration was created.
For example, assume we created a migration M1 and apply it by issuing command Update-Database. After applying M1, if we add a new property P to a class C and create another migration M2 by issuing command Add-Migration M2, then migration tool will somehow be able to figure out that only change ( after M1 was created ) we made to the model was adding a new property P to class C. How does migration tool figure that out?
thank you
REPLY:
Migrations uses __Migrations table to figure which migrations have already been applied and which have yet to be applied, but I thought it doesn't use this table to also figure out what changed from one migration to another, since data in migrations table is a hash, which means it can't be decrypted, which I assume would be necessary so that current model metadata can be compared with latest metadata stored in the migrations table?!
Or are you implying that it is able to figure out just by comparing hash values ( of current and stored versions ) which properties have changed or were deleted or were added to an entity?
It stores your model versions in the database (migrations history table) and compares your current model with the model stored in your database.
The model is stored in .resx file under each mifration in the Target resource value. It is an encoded (serialized) model. It is used to compare your current model and generate the next migration.