C#•2y ago

❔ postgres EF core, how to have a custom connection string config file

Hey, I have a net6 class library with a DbContext, I want to have the connection string in a separate custom config file, code below. For some reason, when I do dotnet ef database update, an error pops up:

System.ArgumentException: Couldn't set min pool size (Parameter 'min pool size')
 ---> System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary. *...*
   
Couldn't set min pool size (Parameter 'min pool size')

System.ArgumentException: Couldn't set min pool size (Parameter 'min pool size')
 ---> System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary. *...*
   
Couldn't set min pool size (Parameter 'min pool size')

My connection string looks like this:

User ID=postgres;Password=<PASSWORD>;Host=localhost;Port=5432;Database=NetSendHost;Pooling=true;Min Pool Size=0;Max Pool Size=250;Connection Lifetime=0;

    public class Db : DbContext
    {
        private static readonly string ConnectionString;
        static Db()
        {
            var obj = JsonDocument.Parse(File.ReadAllText("Config/config.json"));
            ConnectionString = obj.RootElement.GetProperty("PgSqlConnectionString").GetString();
        }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder.UseNpgsql(ConnectionString);
        }
        public DbSet<PrivateServerUser> ServerUsers { get; set; }

    }

    public class Db : DbContext
    {
        private static readonly string ConnectionString;
        static Db()
        {
            var obj = JsonDocument.Parse(File.ReadAllText("Config/config.json"));
            ConnectionString = obj.RootElement.GetProperty("PgSqlConnectionString").GetString();
        }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder.UseNpgsql(ConnectionString);
        }
        public DbSet<PrivateServerUser> ServerUsers { get; set; }

    }

9 Replies

Unknown User•2y ago

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khamas•2y ago

no it's a class library, and I also want the file containing the connection string to be separate lemme try same error when I put the raw string in the options @Deleted User

Unknown User•2y ago

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khamas•2y ago

could you tell me what is wrong with this one if you know postgres?

User ID=postgres;Password=<PASSWORD>;Host=localhost;Port=5432;Database=NetSendHost;Pooling=true;Min Pool Size=0;Max Pool Size=250;Connection Lifetime=0;

Unknown User•2y ago

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khamas•2y ago

Unknown User•2y ago

Message Not Public

khamas•2y ago

yeah constr was crooked thanks

Accord•2y ago

Looks like nothing has happened here. I will mark this as stale and this post will be archived until there is new activity.

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❔ postgres EF core, how to have a custom connection string config file