npgsql

I'm trying to insert a row into a PostgreSQL table with a serial primary key and I need to retrieve this column after it was inserted. I got something like this: The table "pais" has 3 columns: id, pais, capital; id is a serial column and is its primary key. NpgsqlCommand query = new NpgsqlCommand("insert into pais(nombre, capital) values(@nombre, @capital)", conn); query.Parameters.Add(new NpgsqlParameter("nombre", NpgsqlDbType.Varchar)); query.Parameters.Add(new NpgsqlParameter("capital", NpgsqlDbType.Varchar)); query.Prepare(); query.Parameters[0].Value = this.textBox1.Text; query

I have an array of strings, and I'd like to have a query containing an IN clause, like: "... WHERE t.name IN ('foo', 'bar', 'baz')..>" Here's the final bit of my query, which contains a "where X in Y" clause: ... left join genre_tag_band_join tj on hb.id = tj.band_id or ob.id = tj.band_id left join genre_tags t on tj.genre_tag_id = t.id inner join venues v on e.venue_id = v.id where t.name IN @tagsParam... I make a Dapper call like this var shows = con.Query<Event, Band, Band, GenreTag, Venue, Event>(query, (e, hb, ob, gt, v) => { Event show; ... return e; }, new { tagsParam = tagsArr})

Is it possible to use arrays in Entity Framework with PostgreSql? Suppose, for instance, we had the POCO class public class MyTable { [Key] [Column("gid")] public int Gid { get; set; } [Column("name")] public string Name { get; set; } [Column("email")] public string Email { get; set; } [Column("somedata")] public int[] SomeData { get; set; } } At this point Entity Framework simply does not create the column "somedata" and skips it. Is there a way to do this anyway? And by that I mean not having to use a separate table. Postgres arrays come in handy at times where you want to store a small or

I'm trying to create a small POC for my boss about the hybrid of npgsql 12 and ef6, created a new project on visual studio created a sample database created the corresponding classes and the dbcontext yet, whenever I try and use ef to access the database I receive the folowing error: The 'Instance' member of the Entity Framework provider type 'Npgsql.NpgsqlFactory, Npgsql, Version=2.0.12.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7' did not return an object that inherits from 'System.Data.Entity.Core.Common.DbProviderServices'. Entity Framework providers must inherit from this class and

I'm trying to select a number of fields, one of which needs to be an array with each element of the array containing two values. Each array item needs to contain a name (character varying) and an ID (numeric). I know how to return an array of single values (using the ARRAY keyword) but I'm unsure of how to return an array of an object which in itself contains two values. The query is something like SELECT t.field1, t.field2, ARRAY(--with each element containing two values i.e. {'TheName', 1 }) FROM MyTable t I read that one way to do this is by selecting the values into a type and then

I´ve had the problem, that my AspNetCore.App-metapackage referenced a lower Version of EntityFrameworkCore (2.1.2), than a EfCore provider package (NpgSql, referencing 2.1.3). The result was the warning MSB3277 ( here is the question ). The quickfix for that was the accepted answer. Another answer pointed out, that I´ve worked with a lower Microsoft.AspNetCore.App package (2.1.1 at that time) than the last stable version (2.1.4). Changing the package Version was not possible (see picture below). I´ve had the same issue with Microsoft.NETCore.App in a class library-project I even didn´t noticed