amanuensis/backend/membership.py

@@ -2,8 +2,6 @@
 Membership query interface
 """
 
-from sqlalchemy import select, func
-
 from amanuensis.db import DbContext, Membership
 from amanuensis.errors import ArgumentError
 
@@ -16,7 +14,7 @@ def create(
     """
     Create a new user membership in a lexicon.
     """
-    # Verify argument types are correct
+    # Quick argument verification
     if not isinstance(user_id, int):
         raise ArgumentError('user_id')
     if not isinstance(lexicon_id, int):
@@ -24,14 +22,6 @@ def create(
     if not isinstance(is_editor, bool):
         raise ArgumentError('is_editor')
 
-    # Verify user has not already joined lexicon
-    if db(
-        select(func.count(Membership.id))
-        .where(Membership.user_id == user_id)
-        .where(Membership.lexicon_id == lexicon_id)
-    ).scalar() > 0:
-        raise ArgumentError('User is already a member of lexicon')
-
     new_membership = Membership(
         user_id=user_id,
         lexicon_id=lexicon_id,

amanuensis/db/__init__.py

@@ -13,19 +13,3 @@ from .models import (
     ArticleContentRule,
     Post,
 )
-
-__all__ = [
-    'DbContext',
-    'User',
-    'Lexicon',
-    'Membership',
-    'Character',
-    'ArticleState',
-    'Article',
-    'IndexType',
-    'ArticleIndex',
-    'ArticleIndexRule',
-    'ArticleContentRuleType',
-    'ArticleContentRule',
-    'Post',
-]

amanuensis/db/database.py

@@ -33,10 +33,5 @@ class DbContext():
         # Create a thread-safe session factory
         self.session = scoped_session(sessionmaker(bind=self.engine))
 
-    def __call__(self, *args, **kwargs):
-        """Provides shortcut access to session.execute."""
-        return self.session.execute(*args, **kwargs)
-
     def create_all(self):
-        """Initializes the database schema."""
         ModelBase.metadata.create_all(self.engine)

amanuensis/db/models.py

@@ -2,8 +2,6 @@
 Data model SQL definitions
 """
 import enum
-import uuid
-
 from sqlalchemy import (
     Boolean,
     Column,
@@ -19,7 +17,7 @@ from sqlalchemy import (
     TypeDecorator,
 )
 from sqlalchemy.orm import relationship, backref
-from sqlalchemy.sql.schema import UniqueConstraint
+import uuid
 
 from .database import ModelBase
 
@@ -235,9 +233,6 @@ class Membership(ModelBase):
     Represents a user's participation in a Lexicon game.
     """
     __tablename__ = 'membership'
-    __table_args__ = (
-        UniqueConstraint('user_id', 'lexicon_id'),
-    )
 
     ###################
     # Membership keys #

tests/test_membership.py

@@ -1,9 +1,4 @@
-import pytest
-
-from sqlalchemy import select
-
-from amanuensis.db import *
-from amanuensis.errors import ArgumentError
+from amanuensis.db import DbContext
 import amanuensis.backend.membership as memq
 
 
@@ -20,22 +15,10 @@ def test_create_membership(db: DbContext, make_user, make_lexicon):
     assert mem, 'Failed to create membership'
 
     # Check that the user and lexicon are mutually visible in the ORM relationships
-    assert any(map(lambda mem: mem.lexicon == new_lexicon, new_user.memberships))
-    assert any(map(lambda mem: mem.user == new_user, new_lexicon.memberships))
+    assert new_user.memberships, 'User memberships not updated'
+    assert new_lexicon.memberships, 'Lexicon memberships not updated'
+    assert new_user.memberships[0].lexicon_id == new_lexicon.id
+    assert new_lexicon.memberships[0].user_id == new_user.id
 
     # Check that the editor flag was set properly
-    editor = db(
-        select(User)
-        .join(User.memberships)
-        .join(Membership.lexicon)
-        .where(Lexicon.id == new_lexicon.id)
-        .where(Membership.is_editor == True)
-    ).scalar_one()
-    assert editor is not None
-    assert isinstance(editor, User)
-    assert editor.id == new_user.id
-
-    # Check that joining twice is not allowed
-    with pytest.raises(ArgumentError):
-        mem2 = memq.create(db, new_user.id, new_lexicon.id, False)
-        assert mem2
+    assert new_lexicon.memberships