67 lines
2.1 KiB
Plaintext
67 lines
2.1 KiB
Plaintext
Logging/Debugging (EF CORE)
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===========================
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Once you configure logging on a DbContext instance it will be enabled on all instances of that DbContext type
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using var context = new MyContext();
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context.ConfigureLogging(s => System.Diagnostics.Debug.WriteLine(s)); // write to Visual Studio "Output" tab
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//context.ConfigureLogging(s => Console.WriteLine(s));
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see comments at top of file:
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Dinah.EntityFrameworkCore\DbContextLoggingExtensions.cs
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LocalDb
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=======
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SSMS db connection: (LocalDb)\MSSQLLocalDB
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eg: Server=(localdb)\mssqllocaldb;Database=DataLayer.LibationContext;Integrated Security=true;
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LocalDb database files live at:
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C:\Users\[user]\DataLayer.LibationContext.mdf
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C:\Users\[user]\DataLayer.LibationContext_log.ldf
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Migrations
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==========
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Visual Studio, EF Core
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----------------------
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View > Other Windows > Package Manager Console
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Default project: DataLayer
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Startup project: DataLayer
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since we have mult contexts, must use -context:
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Add-Migration MyComment -context LibationContext
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Update-Database -context LibationContext
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QUICK VIEW
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==========
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declare @productId nvarchar(450) = 'B075Y4SWJ8'
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declare @bookId int
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declare @catId int
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select @bookId = b.BookId from Books b where b.AudibleProductId = @productId
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select @catId = b.CategoryId from Books b where b.AudibleProductId = @productId
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select * from Books b where b.AudibleProductId = @productId
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select *
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from BookContributor bc
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join Contributors c on bc.ContributorId = c.ContributorId
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where bc.BookId = @bookId order by role, [order]
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select *
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from SeriesBook sb
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join Series s on sb.SeriesId = s.SeriesId
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where sb.BookId = @bookId
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select *
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from Categories c1
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left join Categories c2 on c1.ParentCategoryCategoryId = c2.CategoryId
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where c1.CategoryId = @catId
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ERROR
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=====
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Add-Migration : The term 'Add-Migration' is not recognized as the name of a cmdlet, function, script file, or operable program
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SOLUTION
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--------
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dependencies > manage nuget packages
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add: Microsoft.EntityFrameworkCore.Tools
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SQLite
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======
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SQLite does not support all migrations (schema changes) due to limitations in SQLite
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delete db before running Update-Database? |