Template mapping and detect issue fixed

docengine/app/api/v1/templates.py

@@ -83,6 +83,63 @@ def create_template(
     }
 
 
+@router.put(
+    "/{template_id}",
+    response_model=dict,
+    summary="Update Template",
+    description="Update an existing template name and its fields.",
+)
+def update_template(
+    template_id: uuid.UUID,
+    payload: TemplateCreateRequest,
+    current_user: CurrentUser,
+    db: Session = Depends(get_db),
+) -> dict:
+    """Update a template."""
+    template_repo = TemplateRepository(db)
+    template = template_repo.get_by_id(template_id)
+    if not template:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"Template '{template_id}' not found",
+        )
+
+    if template.name != payload.template_name:
+        template.name = payload.template_name
+
+    from app.models.template import DocumentCell
+    db.query(DocumentCell).filter(DocumentCell.format_id == template_id).delete()
+    
+    saved_fields = []
+    cell_repo = DocumentCellRepository(db)
+    for index, field in enumerate(payload.fields):
+        cell = cell_repo.create_cell(
+            format_id=template.id,
+            page_number=1,
+            row_no=0,
+            column_no=0,
+            field_name=field.field_label,
+            data_type=field.field_type,
+            x=0.0,
+            y=0.0,
+            width=0.0,
+            height=0.0,
+            is_dynamic=True
+        )
+        saved_fields.append({
+            "field_label": cell.field_name,
+            "field_type": cell.data_type
+        })
+        
+    db.commit()
+
+    return {
+        "pk_template_id": str(template.id),
+        "template_name": template.name,
+        "fields": saved_fields
+    }
+
+
 @router.post(
     "/{template_id}/mappings/save",
     response_model=SuccessResponse,
@@ -109,6 +166,15 @@ def save_mappings(
     table_repo = TableFormatRepository(db)
     table_col_repo = TableColumnRepository(db)
     
+    # Delete existing field mappings and table formats for this template
+    from app.models.template import DocumentRegion, TableFormat
+    db.query(DocumentRegion).filter(
+        DocumentRegion.format_id == template_id, 
+        DocumentRegion.region_type == "field_mapping"
+    ).delete()
+    db.query(TableFormat).filter(TableFormat.format_id == template_id).delete()
+    db.flush()
+
     cells = cell_repo.get_template_cells(template_id)
     cell_map = {c.field_name: c for c in cells}
     table_format = None