Fixed schema prefix in sequence reference messing server defaults

Fixes #176.

Author: agronholm

CHANGES.rst

@@ -7,6 +7,7 @@ Version history
 - Fixed unwarranted ``ForeignKey`` declarations appearing in column attributes when there are
   named, single column foreign key constraints (PR by Leonardus Chen)
 . Fixed ``KeyError`` when rendering an index without any columns
+- Fixed improper handling of schema prefixes in sequence names in server defaults
 - Worked around PostgreSQL UUID columns getting ``Any`` as the type annotation
 
 **3.0.0b3**

src/sqlacodegen/generators.py

@@ -71,7 +71,9 @@
 _re_enum_check_constraint = re.compile(r"(?:.*?\.)?(.*?) IN \((.+)\)")
 _re_enum_item = re.compile(r"'(.*?)(?<!\\)'")
 _re_invalid_identifier = re.compile(r"(?u)\W")
-_re_postgresql_nextval_sequence = re.compile(r"nextval\('(.+)'::regclass\)")
+_re_postgresql_nextval_sequence = re.compile(
+    r"nextval\('(?:\"(.+?)\"\.)?(.+)'::regclass\)"
+)
 
 
 class CodeGenerator(metaclass=ABCMeta):
@@ -405,9 +407,17 @@ def render_column(self, column: Column[Any], show_name: bool) -> str:
                     )
                     if match:
                         # Add an explicit sequence
-                        if match.group(1) != f"{column.table.name}_{column.name}_seq":
+                        if match.group(2) != f"{column.table.name}_{column.name}_seq":
+                            callable_kwargs = {}
+                            if match.group(1):
+                                callable_kwargs["schema"] = repr(match.group(1))
+
                             args.append(
-                                render_callable("Sequence", repr(match.group(1)))
+                                render_callable(
+                                    "Sequence",
+                                    repr(match.group(2)),
+                                    kwargs=callable_kwargs,
+                                )
                             )
                             self.add_literal_import("sqlalchemy", "Sequence")
 

tests/test_generators.py

@@ -4,7 +4,7 @@
 
 import pytest
 from _pytest.fixtures import FixtureRequest
-from sqlalchemy import PrimaryKeyConstraint
+from sqlalchemy import PrimaryKeyConstraint, Sequence
 from sqlalchemy.dialects import mysql, postgresql
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.engine import Engine, create_engine
@@ -933,6 +933,37 @@ def test_postgresql_sequence_nonstandard_name(
             """,
         )
 
+    @pytest.mark.parametrize("engine", ["postgresql"], indirect=["engine"])
+    def test_postgresql_sequence_with_schema(self, generator: CodeGenerator) -> None:
+        Table(
+            "simple_items",
+            generator.metadata,
+            Column(
+                "id",
+                INTEGER,
+                primary_key=True,
+                server_default=text("nextval('\"myschema\".test_seq'::regclass)"),
+            ),
+            schema="myschema",
+        )
+
+        validate_code(
+            generator.generate(),
+            """\
+            from sqlalchemy import Column, Integer, MetaData, Sequence, Table
+
+            metadata = MetaData()
+
+
+            t_simple_items = Table(
+                'simple_items', metadata,
+                Column('id', Integer, Sequence('test_seq', schema='myschema'), \
+primary_key=True),
+                schema='myschema'
+            )
+            """,
+        )
+
 
 class TestDeclarativeGenerator:
     @pytest.fixture