check other backends trial1

ormar/fields/base.py

@@ -211,12 +211,17 @@ class BaseField(FieldInfo):
         :return: List of sqlalchemy foreign keys - by default one.
         :rtype: List[sqlalchemy.schema.ForeignKey]
         """
-        return [
-            sqlalchemy.schema.ForeignKey(
-                con.name, ondelete=con.ondelete, onupdate=con.onupdate
+        constraints = [
+            sqlalchemy.ForeignKey(
+                con.reference,
+                ondelete=con.ondelete,
+                onupdate=con.onupdate,
+                name=f"fk_{cls.owner.Meta.tablename}_{cls.to.Meta.tablename}"
+                f"_{cls.to.get_column_alias(cls.to.Meta.pkname)}_{cls.name}",
             )
             for con in cls.constraints
         ]
+        return constraints
 
     @classmethod
     def get_column(cls, name: str) -> sqlalchemy.Column:
@@ -230,7 +235,7 @@ class BaseField(FieldInfo):
         :return: actual definition of the database column as sqlalchemy requires.
         :rtype: sqlalchemy.Column
         """
-        return sqlalchemy.Column(
+        column = sqlalchemy.Column(
             cls.alias or name,
             cls.column_type,
             *cls.construct_constraints(),
@@ -241,6 +246,7 @@ class BaseField(FieldInfo):
             default=cls.default,
             server_default=cls.server_default,
         )
+        return column
 
     @classmethod
     def expand_relationship(

ormar/fields/foreign_key.py

@@ -3,6 +3,7 @@ import uuid
 from dataclasses import dataclass
 from typing import Any, List, Optional, TYPE_CHECKING, Tuple, Type, Union
 
+import sqlalchemy
 from pydantic import BaseModel, create_model
 from pydantic.typing import ForwardRef, evaluate_forwardref
 from sqlalchemy import UniqueConstraint
@@ -94,6 +95,7 @@ def populate_fk_params_based_on_to_model(
     :rtype: Tuple[Any, List, Any]
     """
     fk_string = to.Meta.tablename + "." + to.get_column_alias(to.Meta.pkname)
+    to.Meta.tablename + "." + to.get_column_alias(to.Meta.pkname)
     to_field = to.Meta.model_fields[to.Meta.pkname]
     pk_only_model = create_dummy_model(to, to_field)
     __type__ = (
@@ -103,7 +105,7 @@ def populate_fk_params_based_on_to_model(
     )
     constraints = [
         ForeignKeyConstraint(
-            name=fk_string, ondelete=ondelete, onupdate=onupdate  # type: ignore
+            reference=fk_string, ondelete=ondelete, onupdate=onupdate, name=None
         )
     ]
     column_type = to_field.column_type
@@ -124,9 +126,10 @@ class ForeignKeyConstraint:
     to produce sqlalchemy.ForeignKeys
     """
 
-    name: str
-    ondelete: str
-    onupdate: str
+    reference: Union[str, sqlalchemy.Column]
+    name: Optional[str]
+    ondelete: Optional[str]
+    onupdate: Optional[str]
 
 
 def ForeignKey(  # noqa CFQ002

ormar/fields/model_fields.py

@@ -214,7 +214,7 @@ class Integer(ModelFieldFactory, int):
         :return: initialized column with proper options
         :rtype: sqlalchemy Column
         """
-        return sqlalchemy.Integer()
+        return sqlalchemy.Integer
 
 
 class Text(ModelFieldFactory, str):

ormar/models/helpers/sqlalchemy.py

@@ -1,9 +1,7 @@
-import copy
 import logging
 from typing import Dict, List, Optional, TYPE_CHECKING, Tuple, Type, Union
 
 import sqlalchemy
-from sqlalchemy import ForeignKeyConstraint
 
 from ormar import ForeignKey, Integer, ModelDefinitionError  # noqa: I202
 from ormar.fields import BaseField, ManyToManyField
@@ -81,10 +79,12 @@ def create_and_append_m2m_fk(
             model.Meta.tablename + "." + pk_alias,
             ondelete="CASCADE",
             onupdate="CASCADE",
+            name=f"fk_{model_field.through.Meta.tablename}_{model.Meta.tablename}"
+            f"_{field_name}_{pk_alias}",
         ),
     )
     model_field.through.Meta.columns.append(column)
-    model_field.through.Meta.table.append_column(copy.deepcopy(column))
+    model_field.through.Meta.table.append_column(column)
 
 
 def check_pk_column_validity(
@@ -235,18 +235,15 @@ def populate_meta_sqlalchemy_table_if_required(meta: "ModelMeta") -> None:
     if not hasattr(meta, "table") and check_for_null_type_columns_from_forward_refs(
         meta
     ):
-        if meta.tablename == 'albums':
-            meta.constraints.append(ForeignKeyConstraint(['artist'],['artists.id'],
-                                                         ondelete='CASCADE',
-                                                         onupdate='CASCADE'))
+        for constraint in meta.constraints:
+            if isinstance(constraint, sqlalchemy.UniqueConstraint):
+                constraint.name = (
+                    f"uc_{meta.tablename}_"
+                    f'{"_".join([str(col) for col in constraint._pending_colargs])}'
+                )
         table = sqlalchemy.Table(
-            meta.tablename,
-            meta.metadata,
-            *[copy.deepcopy(col) for col in meta.columns],
-            *meta.constraints,
+            meta.tablename, meta.metadata, *meta.columns, *meta.constraints,
         )
-        if meta.tablename == 'albums':
-            pass
         meta.table = table
 
 

ormar/models/metaclass.py

@@ -33,6 +33,7 @@ from ormar.models.helpers import (
     populate_meta_tablename_columns_and_pk,
     register_relation_in_alias_manager,
 )
+from ormar.models.helpers.sqlalchemy import sqlalchemy_columns_from_model_fields
 from ormar.models.quick_access_views import quick_access_set
 from ormar.queryset import QuerySet
 from ormar.relations.alias_manager import AliasManager
@@ -348,20 +349,25 @@ def copy_and_replace_m2m_through_model(
     new_meta: ormar.ModelMeta = type(  # type: ignore
         "Meta", (), dict(through_class.Meta.__dict__),
     )
+    copy_name = through_class.__name__ + attrs.get("__name__", "")
+    copy_through = type(copy_name, (ormar.Model,), {"Meta": new_meta})
     new_meta.tablename += "_" + meta.tablename
     # create new table with copied columns but remove foreign keys
     # they will be populated later in expanding reverse relation
     if hasattr(new_meta, "table"):
         del new_meta.table
-    new_meta.columns = [col for col in new_meta.columns if not col.foreign_keys]
     new_meta.model_fields = {
         name: field
         for name, field in new_meta.model_fields.items()
         if not issubclass(field, ForeignKeyField)
     }
+    if hasattr(new_meta, "column"):
+        del new_meta.columns
+    _, columns = sqlalchemy_columns_from_model_fields(
+        new_meta.model_fields, copy_through
+    )  # type: ignore
+    new_meta.columns = columns
     populate_meta_sqlalchemy_table_if_required(new_meta)
-    copy_name = through_class.__name__ + attrs.get("__name__", "")
-    copy_through = type(copy_name, (ormar.Model,), {"Meta": new_meta})
     copy_field.through = copy_through
 
     parent_fields[field_name] = copy_field

ormar/queryset/queryset.py

@@ -590,6 +590,7 @@ class QuerySet:
         expr = FilterQuery(filter_clauses=self.filter_clauses).apply(
             self.table.delete()
         )
+        print("\n", expr.compile(compile_kwargs={"literal_binds": True}))
         return await self.database.execute(expr)
 
     def paginate(self, page: int, page_size: int = 20) -> "QuerySet":