fix pg settings type and add tests

CHANGES.md

@@ -12,6 +12,9 @@ Note: Minor version `0.X.0` update might break the API, It's recommended to pin
 
 - forward `catalog_dependency` in `OGCFeaturesFactory` and `OGCTilesFactory` when using `Endpoints` factory
 - allow Factory's prefix with path parameter
+- changed `database_url` type in `PostgresSettings` to always be of `pydantic.PostgresDsn` type
+- `postgres_port` type in `PostgresSettings` to be of `integer` type
+- remove additional `/` prefix for dbname when constructing the database url from individual parameters
 
 ### changed
 

tests/test_settings.py

@@ -0,0 +1,50 @@
+"""test tipg settings classes."""
+
+import pytest
+from pydantic import ValidationError
+
+from tipg.settings import PostgresSettings
+
+
+def test_pg_settings(monkeypatch):
+    """test PostgresSettings class."""
+    # Makes sure we don't have any pg env set
+    monkeypatch.delenv("DATABASE_URL", raising=False)
+    monkeypatch.delenv("POSTGRES_USER", raising=False)
+    monkeypatch.delenv("POSTGRES_PASS", raising=False)
+    monkeypatch.delenv("POSTGRES_HOST", raising=False)
+    monkeypatch.delenv("POSTGRES_PORT", raising=False)
+    monkeypatch.delenv("POSTGRES_DBNAME", raising=False)
+
+    # Should raises a validation error if no env or parameters is passed
+    with pytest.raises(ValidationError):
+        # we use `_env_file=None` to make sure pydantic do not use any `.env` files in local environment
+        PostgresSettings(_env_file=None)
+
+    settings = PostgresSettings(
+        postgres_user="user",
+        postgres_pass="secret",
+        postgres_host="0.0.0.0",
+        postgres_port=8888,
+        postgres_dbname="db",
+        _env_file=None,
+    )
+    assert str(settings.database_url) == "postgresql://user:secret@0.0.0.0:8888/db"
+
+    # Make sure pydantic will cast the port to integer
+    settings = PostgresSettings(
+        postgres_user="user",
+        postgres_pass="secret",
+        postgres_host="0.0.0.0",
+        postgres_port="8888",
+        postgres_dbname="db",
+        _env_file=None,
+    )
+    assert str(settings.database_url) == "postgresql://user:secret@0.0.0.0:8888/db"
+    assert settings.postgres_port == 8888
+
+    settings = PostgresSettings(
+        database_url="postgresql://user:secret@0.0.0.0:8888/db", _env_file=None
+    )
+    assert str(settings.database_url) == "postgresql://user:secret@0.0.0.0:8888/db"
+    assert not settings.postgres_port

tipg/settings.py

@@ -1,7 +1,7 @@
 """tipg config."""
 
 import pathlib
-from typing import Any, Dict, List, Optional
+from typing import Dict, List, Optional
 
 from pydantic import (
     DirectoryPath,
@@ -117,7 +117,7 @@ class PostgresSettings(BaseSettings):
     postgres_user: Optional[str] = None
     postgres_pass: Optional[str] = None
     postgres_host: Optional[str] = None
-    postgres_port: Optional[str] = None
+    postgres_port: Optional[int] = None
     postgres_dbname: Optional[str] = None
 
     database_url: Optional[PostgresDsn] = None
@@ -131,18 +131,20 @@ class PostgresSettings(BaseSettings):
 
     # https://github.com/tiangolo/full-stack-fastapi-postgresql/blob/master/%7B%7Bcookiecutter.project_slug%7D%7D/backend/app/app/core/config.py#L42
     @field_validator("database_url", mode="before")
-    def assemble_db_connection(cls, v: Optional[str], info: FieldValidationInfo) -> Any:
+    def assemble_db_connection(
+        cls, v: Optional[str], info: FieldValidationInfo
+    ) -> PostgresDsn:
         """Validate db url settings."""
         if isinstance(v, str):
-            return v
+            return PostgresDsn(v)
 
         return PostgresDsn.build(
             scheme="postgresql",
             username=info.data.get("postgres_user"),
             password=info.data.get("postgres_pass"),
             host=info.data.get("postgres_host", ""),
             port=info.data.get("postgres_port", 5432),
-            path=f"/{info.data.get('postgres_dbname') or ''}",
+            path=info.data.get("postgres_dbname", ""),
         )