Can I add a new column to the existing Clients table, which is autogenerated by the IdentityServer4.EntityFramework ?
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If I have a database containing 2 tables one contains stock prices and the other contains information on the various stocks. The table containing the stock prices has a column that contains the stock ID ( the foreign key) which maps to the ID in the stock information table.
How would I set this up in Entity framework, if I look at the .edmx diagram and add a new Association I am unable to specify the key mapping?
I'm using Entity Framework (6) in a code-first arrangement to create a database and pre-populate it from a set of CSV files. Because the tables are coming from another application, they already have primary keys, and relationships embedded in the data make reference to those keys.
For that reason I've been using [DatabaseGenerated(DatabaseGeneratedOption.None)] when defining these tables, so that the PKs already in place get used.
However, after the data have been imported, I want to be able to add new records to the tables. How do I get the DB to assign new sequential PKs for the new records?
I have an app engine(Java) connected android application. I have an entity with some fields. Now I want to add another field to the entity in the new version of the app engine project. But I already have existing entities in the datastore. How can I update existing entities so that it includes the new field?
Add the new field to the model. and you will have it in the datastore, if you want to assign them values , loop through the entities and assign values and put them , other wise the datastore will return None for the records where the new field is not set
I have an existing database.I am using code first from existing database.I am able to add new column to an existing table using add-migration and update database command.
But when I want to generate new table using a class new table is not created.
For example I want to create a new table LocaleResource.I have created a new class.
I have fired add-migration LocaleResourceClass and then Update database command.
But no new table is creating.I am using Entity Framework 6.1.
Please help me how to do that.
In order to have a migration created you have to add the new table to your context.
public virtual DbSet<LocalResource> LocalResources {get; set;}
Otherwise the migration macro does not know about your new table.
In case you are not sure where it was created just search your project for DbSet
Please assume that we are creating a project for a corporation with 10 employees and each employee has a table in our database. we can simply work with this tables using entity. But in future the number of employees will be added and our application must dynamically create table for them. How to work with these new tables using entity?