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59 lines
3.3 KiB
59 lines
3.3 KiB
5 years ago
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# Switch to EF Core Oracle Provider
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This document explains how to switch to the **Oracle** database provider for **[the application startup template](Startup-Templates/Application.md)** which comes with SQL Server provider pre-configured.
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## Replace the Volo.Abp.EntityFrameworkCore.SqlServer Package
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`.EntityFrameworkCore` project in the solution depends on the [Volo.Abp.EntityFrameworkCore.SqlServer](https://www.nuget.org/packages/Volo.Abp.EntityFrameworkCore.SqlServer) NuGet package. Remove this package and add the same version of the [Volo.Abp.EntityFrameworkCore.Oracle](https://www.nuget.org/packages/Volo.Abp.EntityFrameworkCore.Oracle) package.
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## Replace the Module Dependency
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Find ***YourProjectName*EntityFrameworkCoreModule** class inside the `.EntityFrameworkCore` project, remove `typeof(AbpEntityFrameworkCoreSqlServerModule)` from the `DependsOn` attribute, add `typeof(AbpEntityFrameworkCoreOracleModule)`
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Also replace `using Volo.Abp.EntityFrameworkCore.SqlServer;` with `using Volo.Abp.EntityFrameworkCore.Oracle;`.
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## UseOracle()
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Find `UseSqlServer()` calls in your solution, replace with `UseOracle()`. Check the following files:
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* *YourProjectName*EntityFrameworkCoreModule.cs inside the `.EntityFrameworkCore` project.
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* *YourProjectName*MigrationsDbContextFactory.cs inside the `.EntityFrameworkCore.DbMigrations` project.
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In the `CreateDbContext()` method of the *YourProjectName*MigrationsDbContextFactory.cs, replace the following code block
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```csharp
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var builder = new DbContextOptionsBuilder<YourProjectNameMigrationsDbContext>()
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.UseSqlServer(configuration.GetConnectionString("Default"));
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```
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with this one (just changes `UseSqlServer(...)` to `UseOracle(...)`)
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```csharp
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var builder = new DbContextOptionsBuilder<YourProjectNameMigrationsDbContext>()
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.UseOracle(configuration.GetConnectionString("Default"));
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```
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> Depending on your solution structure, you may find more code files need to be changed.
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## Change the Connection Strings
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Oracle connection strings are different than SQL Server connection strings. So, check all `appsettings.json` files in your solution and replace the connection strings inside them. See the [connectionstrings.com]( https://www.connectionstrings.com/oracle/ ) for details of Oracle connection string options.
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You typically will change the `appsettings.json` inside the `.DbMigrator` and `.Web` projects, but it depends on your solution structure.
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## Re-Generate the Migrations
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The startup template uses [Entity Framework Core's Code First Migrations](https://docs.microsoft.com/en-us/ef/core/managing-schemas/migrations/) by default.
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EF Core Migrations depend on the selected DBMS provider. Changing the DBMS provider, may not work with the existing migrations.
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* Delete the `Migrations` folder under the `.EntityFrameworkCore.DbMigrations` project and re-build the solution.
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* Run `Add-Migration "Initial"` on the Package Manager Console window (select the `.DbMigrator` (or `.Web`) project as the startup project in the Solution Explorer and select the `.EntityFrameworkCore.DbMigrations` project as the default project in the Package Manager Console).
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This will scaffold a new migration for Oracle.
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Run the `.DbMigrator` project to create the database, apply the changes and seed the initial data.
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## Run the Application
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It is ready. Just run the application and enjoy coding.
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