If ...DbContext.Configuration.ProxyCreationEnabled... is set to ...false..., DbContext will not load child objects for some parent object unless ...Include... method is called on parent object. Setting ...DbContext.Configuration.LazyLoadingEnabled... to ...true... or ...false... will have no impact on its behaviours....If ...DbContext.Configuration...
No-tracking Queries
Sometimes you may want to query for entities but not have the entities be tracked by the context. This may result in better performance when querying for large numbers of entities in read-only scenarios. The AsNoTracking extension method executes a query and returns the results without tracking them in the context. In the follow...
You can create a list from ...db.Resource... and use ...LINQ to Collections... to erase this limitation:...var list = db.Resource.ToList().Select(res => Tuple.Create(res.Resource_ID, res.Name));
...The ...Tuple... class does have some constructors (up to 8 items), but the ...Create()... helper method makes the creation more straightforward.
I agree with the general idea of these posts. An ORM class model is part of a data access layer first and foremost (even if it consists of so-called POCOs). If any conflict of interests arises between persistence and business logic (or any other concern), decisions should always be made in favor of persistence....However, as software developers we ...
From the ...changeset... linked to that work item, you'll see that the ...GuidColumnDefault... isn't based on any settings, but just returns the default based on the provider type...Looking at this ...link..., it would appear you can set it manually in your migrations though:...// Excerpt from migration in link above:
public override void Up()
{
...
You are using wrong generator. Those methods are only generated by ...EntityObject... based generator (the one which is deprecated). Default generator uses POCO classes where these partial methods are not generated - you can modify the generator to add them (it is a T4 template)....To use ...EntityObject... generator:...Delete current .tt file stac...
The easiest method is to simply delete the ...dbo._MigrationHistory... table from these environments. If that table doesn't exist, then only an "initial" migration can ever be generated against that database, which will fail if someone tries to actually apply it to a database with existing tables.
Your solution is good, but I thought I would add a slight variation for others that opens up lots of useful functionality. ...Edit your tt file to make the Context use your own Base class e.g...<#=Accessibility.ForType(container)#> partial class <#=code.Escape(container)#> : DataContextBase {
public <#=code.Escape(container)#>()
: base(...
Got the same error. I am updating my AzureDB from local. I checked the hit box update database at the publish dialog. But u have to do this (delete, rename stuff) force. ...I migrating my DB when the application launches:...public Configuration()
{
AutomaticMigrationsEnabled = true;
AutomaticMigrationDataLossAllowed = true;
...