♻️ Use declarative table configuration to define backend db tables

backend/backend/models/line.py

@@ -5,13 +5,11 @@ from typing import Iterable, Self, Sequence
 from sqlalchemy import (
     BigInteger,
     Boolean,
-    Column,
     Enum,
     ForeignKey,
     Integer,
     select,
     String,
-    Table,
 )
 from sqlalchemy.orm import Mapped, mapped_column, relationship, selectinload
 from sqlalchemy.sql.expression import tuple_
@@ -25,12 +23,14 @@ from ..idfm_interface.idfm_types import (
 )
 from .stop import _Stop
 
-line_stop_association_table = Table(
-    "line_stop_association_table",
-    Base.metadata,
-    Column("line_id", ForeignKey("lines.id")),
-    Column("stop_id", ForeignKey("_stops.id")),
-)
+
+class LineStopAssociations(Base):
+
+    id = mapped_column(BigInteger, primary_key=True)
+    line_id = mapped_column(String, ForeignKey("lines.id"))
+    stop_id = mapped_column(BigInteger, ForeignKey("_stops.id"))
+
+    __tablename__ = "line_stop_associations"
 
 
 class LinePicto(Base):
@@ -83,7 +83,7 @@ class Line(Base):
 
     stops: Mapped[list[_Stop]] = relationship(
         "_Stop",
-        secondary=line_stop_association_table,
+        secondary="line_stop_associations",
         back_populates="lines",
         lazy="selectin",
     )

backend/backend/models/stop.py

@@ -1,11 +1,10 @@
 from __future__ import annotations
 
 from logging import getLogger
-from typing import Annotated, Iterable, Sequence, TYPE_CHECKING
+from typing import Iterable, Sequence, TYPE_CHECKING
 
 from sqlalchemy import (
     BigInteger,
-    Column,
     Computed,
     desc,
     Enum,
@@ -16,7 +15,6 @@ from sqlalchemy import (
     JSON,
     select,
     String,
-    Table,
 )
 from sqlalchemy.orm import (
     mapped_column,
@@ -37,12 +35,13 @@ if TYPE_CHECKING:
 
 logger = getLogger(__name__)
 
-stop_area_stop_association_table = Table(
-    "stop_area_stop_association_table",
-    Base.metadata,
-    Column("stop_id", ForeignKey("_stops.id")),
-    Column("stop_area_id", ForeignKey("stop_areas.id")),
-)
+class StopAreaStopAssociations(Base):
+
+    id = mapped_column(BigInteger, primary_key=True)
+    stop_id = mapped_column(BigInteger, ForeignKey("_stops.id"))
+    stop_area_id = mapped_column(BigInteger, ForeignKey("stop_areas.id"))
+
+    __tablename__ = "stop_area_stop_associations"
 
 
 class _Stop(Base):
@@ -64,12 +63,14 @@ class _Stop(Base):
 
     lines: Mapped[list[Line]] = relationship(
         "Line",
-        secondary="line_stop_association_table",
+        secondary="line_stop_associations",
         back_populates="stops",
         lazy="selectin",
     )
     areas: Mapped[list["StopArea"]] = relationship(
-        "StopArea", secondary=stop_area_stop_association_table, back_populates="stops"
+        "StopArea",
+        secondary="stop_area_stop_associations",
+        back_populates="stops",
     )
     connection_area_id: Mapped[int] = mapped_column(
         ForeignKey("connection_areas.id"), nullable=True
@@ -143,7 +144,7 @@ class StopArea(_Stop):
 
     stops: Mapped[list["Stop"]] = relationship(
         "Stop",
-        secondary=stop_area_stop_association_table,
+        secondary="stop_area_stop_associations",
         back_populates="areas",
         lazy="selectin",
     )

backend/backend/models/user.py

@@ -1,25 +1,27 @@
-from sqlalchemy import Column, ForeignKey, String, Table
+from sqlalchemy import BigInteger, ForeignKey, String
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from ..db import Base, db
 from .stop import _Stop
 
-user_last_stop_search_stops_associations_table = Table(
-    "user_last_stop_search_stops_associations_table",
-    Base.metadata,
-    Column("user_mxid", ForeignKey("user_last_stop_search_results.user_mxid")),
-    Column("stop_id", ForeignKey("_stops.id")),
-)
+
+class UserLastStopSearchStopAssociations(Base):
+    id = mapped_column(BigInteger, primary_key=True)
+    user_mxid = mapped_column(
+        String, ForeignKey("user_last_stop_search_results.user_mxid")
+    )
+    stop_id = mapped_column(BigInteger, ForeignKey("_stops.id"))
+
+    __tablename__ = "user_last_stop_search_stop_associations"
 
 
 class UserLastStopSearchResults(Base):
-
     db = db
 
-    __tablename__ = "user_last_stop_search_results"
-
     user_mxid = mapped_column(String, primary_key=True)
     request_content = mapped_column(String, nullable=False)
     stops: Mapped[_Stop] = relationship(
-        _Stop, secondary=user_last_stop_search_stops_associations_table
+        _Stop, secondary="user_last_stop_search_stop_associations"
     )
+
+    __tablename__ = "user_last_stop_search_results"