abp/docs/en/Entity-Framework-Core-Postg...

# Switch to EF Core PostgreSQL Provider

This document explains how to switch to the **PostgreSQL** database provider for **[the application startup template](Startup-Templates/Application.md)** which comes with SQL Server provider pre-configured.

## Replace the Volo.Abp.EntityFrameworkCore.SqlServer Package

`.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.PostgreSql](https://www.nuget.org/packages/Volo.Abp.EntityFrameworkCore.PostgreSql) package.

## Replace the Module Dependency

Find ***YourProjectName*EntityFrameworkCoreModule** class inside the `.EntityFrameworkCore` project, remove `typeof(AbpEntityFrameworkCoreSqlServerModule)` from the `DependsOn` attribute, add `typeof(AbpEntityFrameworkCorePostgreSqlModule)` (also replace `using Volo.Abp.EntityFrameworkCore.SqlServer;` with `using Volo.Abp.EntityFrameworkCore.PostgreSql;`).

## UseNpgsql()

Find `UseSqlServer()` call in *YourProjectName*EntityFrameworkCoreModule.cs inside the `.EntityFrameworkCore` project and replace with `UseNpgsql()`.


Find `UseSqlServer()` call in *YourProjectName*MigrationsDbContextFactory.cs inside the `.EntityFrameworkCore.DbMigrations` project and replace with `UseNpgsql()`.

> Depending on your solution structure, you may find more `UseSqlServer()` calls that needs to be changed.

## Change the Connection Strings

PostgreSql 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/postgresql/ ) for details of PostgreSql connection string options.

You typically will change the `appsettings.json` inside the `.DbMigrator` and `.Web` projects, but it depends on your solution structure.

## Re-Generate the Migrations

The startup template uses [Entity Framework Core's Code First Migrations](https://docs.microsoft.com/en-us/ef/core/managing-schemas/migrations/). EF Core Migrations depend on the selected DBMS provider. So, changing the DBMS provider will cause the migration fails.

* Delete the Migrations folder under the `.EntityFrameworkCore.DbMigrations` project and re-build the solution.
* Run `Add-Migration "Initial"` on the Package Manager Console (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).

This will create a database migration with all database objects (tables) configured.

Run the `.DbMigrator` project to create the database and seed the initial data.

## Run the Application

It is ready. Just run the application and enjoy coding.
Complete the "Switch to EF Core MySQL Provider" document. 5 years ago			`# Switch to EF Core PostgreSQL Provider`
Added: postgreSQL documentation 5 years ago
Switch to PostgreSql Documentation Updated PostgreSql documentation based on documentation template 5 years ago			`This document explains how to switch to the PostgreSQL database provider for [the application startup template](Startup-Templates/Application.md) which comes with SQL Server provider pre-configured.`
Added: postgreSQL documentation 5 years ago
Switch to PostgreSql Documentation Updated PostgreSql documentation based on documentation template 5 years ago			`## Replace the Volo.Abp.EntityFrameworkCore.SqlServer Package`
Added: postgreSQL documentation 5 years ago
Switch to PostgreSql Documentation Updated PostgreSql documentation based on documentation template 5 years ago			`.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.PostgreSql](https://www.nuget.org/packages/Volo.Abp.EntityFrameworkCore.PostgreSql) package.
Update PostgreSQL-Integration.md Add some necessary steps and provide more information of connectionstring. 5 years ago
Switch to PostgreSql Documentation Updated PostgreSql documentation based on documentation template 5 years ago			`## Replace the Module Dependency`
Updated: more concise instructions to change BookStoreEntityFrameworkCoreModule 5 years ago
Switch to PostgreSql Documentation Updated PostgreSql documentation based on documentation template 5 years ago			Find **YourProjectNameEntityFrameworkCoreModule** class inside the `.EntityFrameworkCore` project, remove `typeof(AbpEntityFrameworkCoreSqlServerModule)` from the `DependsOn` attribute, add `typeof(AbpEntityFrameworkCorePostgreSqlModule)` (also replace `using Volo.Abp.EntityFrameworkCore.SqlServer;` with `using Volo.Abp.EntityFrameworkCore.PostgreSql;`).
Added: postgreSQL documentation 5 years ago
Resolved #3909: Deprecate UsePostgreSql() and rename it to UseNpgsql() for the Volo.Abp.EntityFrameworkCore.PostgreSql package. 5 years ago			`## UseNpgsql()`
Added: section to EF core for postgresql Updated: regenerate initial migration 5 years ago
Resolved #3909: Deprecate UsePostgreSql() and rename it to UseNpgsql() for the Volo.Abp.EntityFrameworkCore.PostgreSql package. 5 years ago			Find `UseSqlServer()` call in YourProjectNameEntityFrameworkCoreModule.cs inside the `.EntityFrameworkCore` project and replace with `UseNpgsql()`.
Added: section to EF core for postgresql Updated: regenerate initial migration 5 years ago

Fix PostgreSQL document 5 years ago			Find `UseSqlServer()` call in YourProjectNameMigrationsDbContextFactory.cs inside the `.EntityFrameworkCore.DbMigrations` project and replace with `UseNpgsql()`.

			> Depending on your solution structure, you may find more `UseSqlServer()` calls that needs to be changed.
Update PostgreSQL-Integration.md give another way to generate database 5 years ago
Switch to PostgreSql Documentation Updated PostgreSql documentation based on documentation template 5 years ago			`## Change the Connection Strings`
Update PostgreSQL-Integration.md give another way to generate database 5 years ago
Switch to PostgreSql Documentation Updated PostgreSql documentation based on documentation template 5 years ago			PostgreSql 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/postgresql/ ) for details of PostgreSql connection string options.
Update PostgreSQL Integration document. 5 years ago
Switch to PostgreSql Documentation Updated PostgreSql documentation based on documentation template 5 years ago			You typically will change the `appsettings.json` inside the `.DbMigrator` and `.Web` projects, but it depends on your solution structure.
Added: postgreSQL documentation 5 years ago
Switch to PostgreSql Documentation Updated PostgreSql documentation based on documentation template 5 years ago			`## Re-Generate the Migrations`
Update PostgreSQL-Integration.md give another way to generate database 5 years ago
Switch to PostgreSql Documentation Updated PostgreSql documentation based on documentation template 5 years ago			`The startup template uses [Entity Framework Core's Code First Migrations](https://docs.microsoft.com/en-us/ef/core/managing-schemas/migrations/). EF Core Migrations depend on the selected DBMS provider. So, changing the DBMS provider will cause the migration fails.`
Update PostgreSQL-Integration.md give another way to generate database 5 years ago
Switch to PostgreSql Documentation Updated PostgreSql documentation based on documentation template 5 years ago			* Delete the Migrations folder under the `.EntityFrameworkCore.DbMigrations` project and re-build the solution.
			* Run `Add-Migration "Initial"` on the Package Manager Console (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).
Update PostgreSQL-Integration.md give another way to generate database 5 years ago
Switch to PostgreSql Documentation Updated PostgreSql documentation based on documentation template 5 years ago			`This will create a database migration with all database objects (tables) configured.`
Update PostgreSQL-Integration.md give another way to generate database 5 years ago
Switch to PostgreSql Documentation Updated PostgreSql documentation based on documentation template 5 years ago			Run the `.DbMigrator` project to create the database and seed the initial data.
Update PostgreSQL-Integration.md give another way to generate database 5 years ago
Switch to PostgreSql Documentation Updated PostgreSql documentation based on documentation template 5 years ago			`## Run the Application`
Update PostgreSQL-Integration.md give another way to generate database 5 years ago
Fix PostgreSQL document 5 years ago			`It is ready. Just run the application and enjoy coding.`