feat(crud): full CRUD for Relation — wire to SQLAlchemy, drop store.py dep

backend/app/routers/relations.py

@@ -1,8 +1,17 @@
-from fastapi import APIRouter, HTTPException, Query
+import json
+from datetime import datetime, timezone
+from uuid import uuid4
 
-from app.schemas import EntityResponse, ListResponse, Relation
-from app.services.inventory import get_node_relations
-from app.services.store import RELATIONS
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy.orm import Session
+
+from app.database import get_db
+from app.models import NetObjectModel, RelationModel
+from app.schemas import (
+    EntityResponse, ListResponse, Relation,
+    RelationCreate, RelationUpdate,
+)
+from app.services.inventory import _to_relation
 
 router = APIRouter(prefix='/relations', tags=['relations'])
 
@@ -14,24 +23,84 @@ def list_relations(
     layer: str | None = None,
     type: str | None = Query(default=None),
     min_confidence: float | None = None,
-) -> ListResponse[Relation]:
-    items = RELATIONS
+    status: str | None = None,
+    db: Session = Depends(get_db),
+):
+    q = db.query(RelationModel)
     if source_id:
-        items = [r for r in items if r.source_id == source_id]
+        q = q.filter(RelationModel.source_id == source_id)
     if target_id:
-        items = [r for r in items if r.target_id == target_id]
+        q = q.filter(RelationModel.target_id == target_id)
     if layer:
-        items = [r for r in items if r.layer == layer]
+        q = q.filter(RelationModel.layer == layer)
     if type:
-        items = [r for r in items if r.type == type]
+        q = q.filter(RelationModel.type == type)
     if min_confidence is not None:
-        items = [r for r in items if r.confidence >= min_confidence]
-    return ListResponse(count=len(items), items=items)
+        q = q.filter(RelationModel.confidence >= min_confidence)
+    if status:
+        q = q.filter(RelationModel.status == status)
+    rows = q.all()
+    return ListResponse(count=len(rows), items=[_to_relation(r) for r in rows])
 
 
 @router.get('/{relation_id}', response_model=EntityResponse[Relation])
-def get_relation(relation_id: str) -> EntityResponse[Relation]:
-    for item in RELATIONS:
-        if item.id == relation_id:
-            return EntityResponse(item=item)
-    raise HTTPException(status_code=404, detail='Relation not found')
+def get_relation(relation_id: str, db: Session = Depends(get_db)):
+    row = db.query(RelationModel).filter(RelationModel.id == relation_id).first()
+    if not row:
+        raise HTTPException(status_code=404, detail='Relation not found')
+    return EntityResponse(item=_to_relation(row))
+
+
+@router.post('', response_model=EntityResponse[Relation], status_code=201)
+def create_relation(body: RelationCreate, db: Session = Depends(get_db)):
+    for fk, val in [('source_id', body.source_id), ('target_id', body.target_id)]:
+        if not db.query(NetObjectModel).filter(NetObjectModel.id == val).first():
+            raise HTTPException(status_code=422, detail=f'{fk} {val!r} not found')
+    now = datetime.now(timezone.utc)
+    row = RelationModel(
+        id=f'rel_{uuid4().hex[:8]}',
+        type=body.type,
+        layer=body.layer,
+        source_id=body.source_id,
+        target_id=body.target_id,
+        direction=body.direction,
+        source=body.source,
+        confidence=body.confidence,
+        status=body.status,
+        attributes_json=json.dumps(body.attributes),
+        created_at=now,
+        updated_at=now,
+    )
+    db.add(row)
+    db.commit()
+    db.refresh(row)
+    return EntityResponse(item=_to_relation(row))
+
+
+@router.patch('/{relation_id}', response_model=EntityResponse[Relation])
+def update_relation(relation_id: str, body: RelationUpdate, db: Session = Depends(get_db)):
+    row = db.query(RelationModel).filter(RelationModel.id == relation_id).first()
+    if not row:
+        raise HTTPException(status_code=404, detail='Relation not found')
+    data = body.model_dump(exclude_unset=True)
+    for fk in ('source_id', 'target_id'):
+        if fk in data and data[fk]:
+            if not db.query(NetObjectModel).filter(NetObjectModel.id == data[fk]).first():
+                raise HTTPException(status_code=422, detail=f'{fk} {data[fk]!r} not found')
+    if 'attributes' in data:
+        data['attributes_json'] = json.dumps(data.pop('attributes'))
+    for field, value in data.items():
+        setattr(row, field, value)
+    row.updated_at = datetime.now(timezone.utc)
+    db.commit()
+    db.refresh(row)
+    return EntityResponse(item=_to_relation(row))
+
+
+@router.delete('/{relation_id}', status_code=204)
+def delete_relation(relation_id: str, db: Session = Depends(get_db)):
+    row = db.query(RelationModel).filter(RelationModel.id == relation_id).first()
+    if not row:
+        raise HTTPException(status_code=404, detail='Relation not found')
+    db.delete(row)
+    db.commit()