NpgsqlTimeout timeout when trying to migrate-CodePudding

I'm developing a project in .Net 5 the database used is Postgres. I'm using a docker-compose file database, but when I run the dotnet ef database update command I get the following error:

Build started...
Build succeeded.
Npgsql.NpgsqlException (0x80004005): Exception while connecting
 ---> System.Net.Sockets.SocketException (111): Connection refused
   at Npgsql.NpgsqlConnector.Connect(NpgsqlTimeout timeout)
   ....
Exception while connecting

Docker-Compose:

version: '3.1'

services:

  db:
    image: postgres
    restart: always
    environment:
      POSTGRES_USER: Guilherme
      POSTGRES_PASSWORD: XXXX
      POSTGRES_DB: BuiltCode

  pgadmin:
    image: dpage/pgadmin4
    restart: always
    environment:
      PGADMIN_DEFAULT_EMAIL: [email protected]
      PGADMIN_DEFAULT_PASSWORD: root
    ports:
      - "5050:80"

Connection String:

"PostgreSql": "Username=Guilherme;Password=XXXX;Server=localhost;Port=5432;Database=BuiltCode;"

Could someone help me, please?

CodePudding user response：

Add under db section:

ports:
- '5432:5432'