Instantiate mutators when a mutated module is created / loaded from DB. Some bug fixes for a few things.

eos/db/saveddata/module.py

@@ -18,6 +18,7 @@
 # ===============================================================================
 
 from sqlalchemy import Table, Column, Integer, ForeignKey, CheckConstraint, Boolean, DateTime
+from sqlalchemy.orm.collections import attribute_mapped_collection
 from sqlalchemy.orm import relation, mapper
 import datetime
 
@@ -47,6 +48,7 @@ mapper(Module, modules_table,
            "mutators": relation(
                    Mutator,
                    backref="module",
-                   cascade="all,delete-orphan"
+                   cascade="all,delete-orphan",
+                   collection_class=attribute_mapped_collection('attrID')
            )
        })

eos/db/saveddata/mutator.py

@@ -25,7 +25,7 @@ from eos.db import saveddata_meta
 from eos.saveddata.mutator import Mutator
 
 mutator_table = Table("mutators", saveddata_meta,
-                        Column("moduleID", Integer, ForeignKey("modules.ID"), nullable=False, index=True),
+                        Column("moduleID", Integer, ForeignKey("modules.ID"), primary_key=True, index=True),
                         Column("attrID", Integer, primary_key=True, index=True),
                         Column("value", Float, nullable=False),
                         Column("created", DateTime, nullable=True, default=datetime.datetime.now),