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postgres support #4716


1
geowikiapps created

Hi,

I'm trying to get AspnetZero working with Postgres.

What I have done.

1)Uninstall the package Microsoft.EntityFrameworkCore.SqlServer 2)add Npgsql.EntityFrameworkCore.PostgreSQL & Npgsql.EntityFrameworkCore.PostgreSQL.Design 3)Modified the DbContext Configure method to use UseNpgsql 4)Added fix for max char error

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    base.OnModelCreating(modelBuilder);

    foreach (var entityType in modelBuilder.Model.GetEntityTypes())
    {
        foreach (var property in entityType.GetProperties())
        {
            // max char length value in sqlserver
            if (property.GetMaxLength() == 67108864)
                // max char length value in postgresql
                property.SetMaxLength(10485760);
        }
    }
}
  1. changed the connection string in appsettings.json

When I ran the migration it fails.

PM> Update-Database
Applying migration '20170623075109_AspNetZero_V4_1_Changes'.
Failed executing DbCommand (18ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
UPDATE AbpEditions SET Discriminator = 'SubscribableEdition'
Npgsql.PostgresException (0x80004005): 42P01: relation "abpeditions" does not exist

any help is appreciated.


3 Answer(s)
  • 1
    alirizaadiyahsi created

    Hi @geowikiapps, did you read following doc: <a class="postlink" href="https://aspnetboilerplate.com/Pages/Documents/EF-Core-PostgreSql-Integration">https://aspnetboilerplate.com/Pages/Doc ... ntegration</a>

    I think you missed this line:

    "Remove all migration classes in the *.EntityFrameworkCore/Migrations folder, because Npgsql.EntityFrameworkCore.PostgreSQL will add some of its own configuration"

  • 0
    sampath created

    30-07-2019

    Doc: https://aspnetboilerplate.com/Pages/Documents/EF-Core-PostgreSql-Integration

    But, You don't need this now:

    To prevent EF Core from calling Program.BuildWebHost(), rename BuildWebHost. For example, change it to InitWebHost.

    This is misleading:

    Delete the *.EntityFrameworkCore/Migrations folder, because Npgsql.EntityFrameworkCore.PostgreSQL will add some of its own configuration to work with Entity Framework Core.

    It should be like this:

    Delete the *.EntityFrameworkCore/Migrations folder's Migration classes. Don't delete Seed folder. Because Npgsql.EntityFrameworkCore.PostgreSQL will add some of its own configuration to work with Entity Framework Core.

  • 0
    ips-ad created

    Hello, I'm trying to do the same and deleted the .EntityFrameworkCore/Migrations folder's Migration classes but not the Seed folder and it's contents. Add-Migration and Update-Database went well:

    PM> add-migration Initial_Migration Build started... Build succeeded. To undo this action, use Remove-Migration. PM> update-database Build started... Build succeeded. Applying migration '20200122140256_Initial_Migration'. Done.

    But after launching the host I get this error:

    Npgsql.PostgresException HResult=0x80004005 Message=42P01: Relation »AbpEditions« existiert nicht Source=Npgsql

    What am I doing wrong? Thanks for help!