SQLite Error 14: 'unable to open database file' with EF Core code first

How to update model working with EF code first with 'Code First from Database'

In a project EF 6.1 was used with an existing database using 'Code First From Database' approach as descibed in this article ...http://msdn.microsoft.com/en-us/data/jj200620...Initially EF generated model classes, later some other classes were added to database and now I need to generate model classes for these new tables as well. ...Please guide h...

Critical issue using EF Core on UWP (unable to open database file)

Steps to reproduce...Follow this simple ...tutorial.......The issue...Start the app either in Debug or Release....An exception occurs with ...db.Database.Migrate();.......Exception thrown: 'Microsoft.Data.Sqlite.SqliteException' in Microsoft.Data.Sqlite.dll. Additional information: SQLite Error 14: 'unable to open database file'....This is the ver...

EF Core SQLITE - SQLite Error 19: 'UNIQUE constraint failed

I am learning entity framework core, using it with SQLITE I have 2 tables in the database....Messages:...CREATE TABLE `Messages` ( `Id` INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, `IsDeleted` INTEGER NOT NULL, `FromUserId` INTEGER, `ToUserId` INTEGER, `SendDate` TEXT NOT NULL, `ReadDate` TEXT NOT NULL, `MessageC...

EF Core SQLite in memory exception: SQLite Error 1: 'near "MAX": syntax error'

I am creating SQLite In Memory database for unit testing:... var connection = new SqliteConnection("DataSource=:memory:"); connection.Open(); try { var options = new DbContextOptionsBuilder<BloggingContext>() .UseSqlite(connection) .Options; // Create the schem...

Problem with EF-Core Code first throwing error because of backing field

I'm having trouble getting my backing fields to work, i've tried my way through using this documentation: ...https://docs.microsoft.com/en-us/ef/core/modeling/backing-field... with no luck....When i try to add the migration i'm greeted with this error: ...The property 'Workflow._step1' is of type 'Step1' which is not supported by current database ...

Xamarin - Entity Framework - SqLite - GetItemsAsync : unable to open database file

In Visual studio 2017, I created a Cross-Platform Mobile App (Xamarin.Forms)...NETStandard 2.0 ...Microsoft.Data.Sqlite.Core 2.2.0...Microsoft.EntityFrameworkCore 2.2.0...Microsoft.EntityFrameworkCore.Sqlite 2.2.0...Microsoft.EntityFrameworkCore.Tools 2.2.0 ...I did a code first migration to Sqlite with Entity Framework following ...the advice of M...

Entity framework Core - Ambiguity over choosing Code First Approach and Database First Approach

Choosing the Code First approach or the Database First approach with ...Entity Framework Core... for my case is looking confusing from best approach point of view....I have an existing database with some complex stored procedures. ...If I choose the Database First approach, will it be good from performance point of view?...If I choose the Code Firs...

What is the difference between EF Core Database-First and EF Core Code-First approaches?

I was wondering... since there is no EDMX in EF Core, what is the difference between those 2? And if the major difference would be the possibility to change the database tables, why not use code first then use EF code-first migrations?

EF Core migration with SQLite database: unable to create object of type

I'm trying to make an initial migration of SQLite database with Entity Framework Core....My solution consists of two projects: Console Application and Class Library (that contains DbContext and all models)....DbContext looks like that:...public class SQLite_DbContext : DbContext { public DbSet<DeviceRepresentation> Devices { get; set; } pub...

Invalid Object Name error when creating database with EF Code First

Hello i am developing a database using ...EF Core Code First....I keep getting this error when generating the database :...Microsoft.EntityFrameworkCore.DbUpdateException: 'An error occurred while updating the entries. See the inner exception for details.'...InnerException {"Invalid object name 'Parents'."} System.Exception {Microsoft.Data.SqlC...