Postgres Identity column does not work

Describe the bug The identity option, as well the the default sequential id value do not work with postgres

To Reproduce

            services.AddFluentMigratorCore()
                .ConfigureRunner(fluentMigratorBuilder => fluentMigratorBuilder
                    .AddPostgres()
                    .WithGlobalConnectionString(connectionString)
                    .ScanIn(AssemblyWithMigrations).For.Migrations()
                )
                .AddLogging(lb => lb.AddFluentMigratorConsole());

With the uuid-ossp installed as an extension on my postgres database the following migration results in an integer primary key:

Create.Table("Players")
.WithColumn("Id").AsGuid().NotNullable().PrimaryKey().Identity()
.WithColumn("FirstName").AsString()

This results in a PK uuid which seems promising:

Create.Table("Players")
.WithColumn("Id").AsGuid().NotNullable().PrimaryKey().WithDefault(SystemMethods.NewSequentialId)
.WithColumn("FirstName").AsString()

however when I attempt the following query: insert into "Players" VALUES ('George')

I get the following error

ERROR:  invalid input syntax for type uuid: "George"
LINE 1: insert into "Players" VALUES ('George')

It seems then that I cannot have an auto generating uuid.

an int identity also doesnt work:

Create.Table("Players")
                .WithColumn("Id").AsInt32().NotNullable().PrimaryKey().Identity()
                .WithColumn("FirstName").AsString().NotNullable();

results in a primary key but not an identity column.

ERROR:  invalid input syntax for type integer: "George"
LINE 1: insert into "Players" VALUES ('George')

Expected behavior An identity column should be generated

Information (please complete the following information):

• OS: [ Windows 10 ]
• Platform [.Net Core 5 / PostgreSQL 13]
• FluentMigrator version [ 3.2.15 ]
• FluentMigrator runner [ “in-process runner” ]
• Database Management System [ Postgres ]
• Database Management System Version [ “pgAdmin 4” ]

[jzabroski]

@lillo42 can you please look

[CraigComeOnThisNameCantBeTaken]

@CraigComeOnThisNameCantBeTaken the problem is your insert query.

The correct query:

insert into "Players" ("FirstName") VALUES ('George') 

When you create a table with default, that means if you don’t pass a value Postgres will use the default value, also in your query you don’t explicit the column, so PostgreSQL is assuming you are going to pass all column.

About this part:

Create.Table("Players")
    .WithColumn("Id").AsGuid().NotNullable().PrimaryKey().Identity()

It doesn’t make sense you use AsGuid and Identity together because Identity is for int or long only.

And about this:

Create.Table("Players")
                .WithColumn("Id").AsInt32().NotNullable().PrimaryKey().Identity()
                .WithColumn("FirstName").AsString().NotNullable();

We generated this query:

create table "Players"
(
    "Id" serial not null primary key,
    "FirstName" text not null
);

Postgres translate it for:

create table "Players" (
    "Id" integer NOT NULL DEFAULT nextval('Players_id_seq'),
    "FirstName" text not null
);

So you need to specific the column too.

For insert query the best thing is use explicit column, I always do it.

Im very sorry! Im sorry I wasted your time and thanks for the help. This was 10/10 stupid.