rewrite: Tasklist module.

bot/data/__init__.py

@@ -1,4 +1,4 @@
-from .conditions import Condition, condition
+from .conditions import Condition, condition, NULL
 from .database import Database
 from .models import RowModel, RowTable, WeakCache
 from .table import Table
@@ -6,4 +6,4 @@ from .base import Expression, RawExpr
 from .columns import ColumnExpr, Column, Integer, String
 from .registry import Registry, AttachableClass, Attachable
 from .adapted import RegisterEnum
-from .queries import ORDER, NULLS
+from .queries import ORDER, NULLS, JOINTYPE

bot/data/conditions.py

@@ -12,6 +12,8 @@ A Condition is a "logical" database expression, intended for use in Where statem
 Conditions support bitwise logical operators ~, &, |, each producing another Condition.
 """
 
+NULL = None
+
 
 class Joiner(Enum):
     EQUALS = ('=', '!=')

bot/data/models.py

@@ -173,6 +173,10 @@ class RowModel:
 
         return obj
 
+    @classmethod
+    def as_tuple(cls):
+        return (cls.table.identifier, ())
+
     def __init__(self, data):
         self.data = data