Feature/customizable request attributes

fastapi_jsonapi/querystring.py

@@ -1,4 +1,5 @@
 """Helper to deal with querystring parameters according to jsonapi specification."""
+from collections import defaultdict
 from functools import cached_property
 from typing import (
     TYPE_CHECKING,
@@ -7,7 +8,6 @@
     List,
     Optional,
     Type,
-    Union,
 )
 from urllib.parse import unquote
 
@@ -22,17 +22,18 @@
 )
 from starlette.datastructures import QueryParams
 
+from fastapi_jsonapi.api import RoutersJSONAPI
 from fastapi_jsonapi.exceptions import (
     BadRequest,
     InvalidField,
     InvalidFilters,
     InvalidInclude,
     InvalidSort,
+    InvalidType,
 )
 from fastapi_jsonapi.schema import (
     get_model_field,
     get_relationships,
-    get_schema_from_type,
 )
 from fastapi_jsonapi.splitter import SPLIT_REL
 
@@ -89,33 +90,45 @@ def __init__(self, request: Request) -> None:
         self.MAX_INCLUDE_DEPTH: int = self.config.get("MAX_INCLUDE_DEPTH", 3)
         self.headers: HeadersQueryStringManager = HeadersQueryStringManager(**dict(self.request.headers))
 
-    def _get_key_values(self, name: str) -> Dict[str, Union[List[str], str]]:
+    def _extract_item_key(self, key: str) -> str:
+        try:
+            key_start = key.index("[") + 1
+            key_end = key.index("]")
+            return key[key_start:key_end]
+        except Exception:
+            msg = "Parse error"
+            raise BadRequest(msg, parameter=key)
+
+    def _get_unique_key_values(self, name: str) -> Dict[str, str]:
         """
         Return a dict containing key / values items for a given key, used for items like filters, page, etc.
 
         :param name: name of the querystring parameter
         :return: a dict of key / values items
         :raises BadRequest: if an error occurred while parsing the querystring.
         """
-        results: Dict[str, Union[List[str], str]] = {}
+        results = {}
 
         for raw_key, value in self.qs.multi_items():
             key = unquote(raw_key)
-            try:
-                if not key.startswith(name):
-                    continue
+            if not key.startswith(name):
+                continue
 
-                key_start = key.index("[") + 1
-                key_end = key.index("]")
-                item_key = key[key_start:key_end]
+            item_key = self._extract_item_key(key)
+            results[item_key] = value
 
-                if "," in value:
-                    results.update({item_key: value.split(",")})
-                else:
-                    results.update({item_key: value})
-            except Exception:
-                msg = "Parse error"
-                raise BadRequest(msg, parameter=key)
+        return results
+
+    def _get_multiple_key_values(self, name: str) -> Dict[str, List]:
+        results = defaultdict(list)
+
+        for raw_key, value in self.qs.multi_items():
+            key = unquote(raw_key)
+            if not key.startswith(name):
+                continue
+
+            item_key = self._extract_item_key(key)
+            results[item_key].extend(value.split(","))
 
         return results
 
@@ -134,7 +147,7 @@ def querystring(self) -> Dict[str, str]:
         return {
             key: value
             for (key, value) in self.qs.multi_items()
-            if key.startswith(self.managed_keys) or self._get_key_values("filter[")
+            if key.startswith(self.managed_keys) or self._get_unique_key_values("filter[")
         }
 
     @property
@@ -159,8 +172,8 @@ def filters(self) -> List[dict]:
                 raise InvalidFilters(msg)
 
             results.extend(loaded_filters)
-        if self._get_key_values("filter["):
-            results.extend(self._simple_filters(self._get_key_values("filter[")))
+        if filter_key_values := self._get_unique_key_values("filter["):
+            results.extend(self._simple_filters(filter_key_values))
         return results
 
     @cached_property
@@ -186,7 +199,7 @@ def pagination(self) -> PaginationQueryStringManager:
         :raises BadRequest: if the client is not allowed to disable pagination.
         """
         # check values type
-        pagination_data: Dict[str, Union[List[str], str]] = self._get_key_values("page")
+        pagination_data: Dict[str, str] = self._get_unique_key_values("page")
         pagination = PaginationQueryStringManager(**pagination_data)
         if pagination_data.get("size") is None:
             pagination.size = None
@@ -199,8 +212,6 @@ def pagination(self) -> PaginationQueryStringManager:
 
         return pagination
 
-    # TODO: finally use this! upgrade Sqlachemy Data Layer
-    #  and add to all views (get list/detail, create, patch)
     @property
     def fields(self) -> Dict[str, List[str]]:
         """
@@ -216,26 +227,32 @@ def fields(self) -> Dict[str, List[str]]:
 
         :raises InvalidField: if result field not in schema.
         """
-        if self.request.method != "GET":
-            msg = "attribute 'fields' allowed only for GET-method"
-            raise InvalidField(msg)
-        fields = self._get_key_values("fields")
-        for key, value in fields.items():
-            if not isinstance(value, list):
-                value = [value]  # noqa: PLW2901
-                fields[key] = value
+        fields = self._get_multiple_key_values("fields")
+        for resource_type, field_names in fields.items():
             # TODO: we have registry for models (BaseModel)
             # TODO: create `type to schemas` registry
-            schema: Type[BaseModel] = get_schema_from_type(key, self.app)
-            for field in value:
-                if field not in schema.__fields__:
+
+            if resource_type not in RoutersJSONAPI.all_jsonapi_routers:
+                msg = f"Application has no resource with type {resource_type!r}"
+                raise InvalidType(msg)
+
+            schema: Type[BaseModel] = self._get_schema(resource_type)
+
+            for field_name in field_names:
+                if field_name == "":
+                    continue
+
+                if field_name not in schema.__fields__:
                     msg = "{schema} has no attribute {field}".format(
                         schema=schema.__name__,
-                        field=field,
+                        field=field_name,
                     )
                     raise InvalidField(msg)
 
-        return fields
+        return {resource_type: set(field_names) for resource_type, field_names in fields.items()}
+
+    def _get_schema(self, resource_type: str) -> Type[BaseModel]:
+        return RoutersJSONAPI.all_jsonapi_routers[resource_type]._schema
 
     def get_sorts(self, schema: Type["TypeSchema"]) -> List[Dict[str, str]]:
         """

fastapi_jsonapi/views/detail_view.py

@@ -12,6 +12,7 @@
     BaseJSONAPIItemInSchema,
     JSONAPIResultDetailSchema,
 )
+from fastapi_jsonapi.views.utils import handle_jsonapi_fields
 from fastapi_jsonapi.views.view_base import ViewBase
 
 if TYPE_CHECKING:
@@ -34,22 +35,24 @@ async def handle_get_resource_detail(
         self,
         object_id: Union[int, str],
         **extra_view_deps,
-    ):
+    ) -> Union[JSONAPIResultDetailSchema, Dict]:
         dl: "BaseDataLayer" = await self.get_data_layer(extra_view_deps)
 
         view_kwargs = {dl.url_id_field: object_id}
         db_object = await dl.get_object(view_kwargs=view_kwargs, qs=self.query_params)
 
-        return self._build_detail_response(db_object)
+        response = self._build_detail_response(db_object)
+        return handle_jsonapi_fields(response, self.query_params, self.jsonapi)
 
     async def handle_update_resource(
         self,
         obj_id: str,
         data_update: BaseJSONAPIItemInSchema,
         **extra_view_deps,
-    ) -> JSONAPIResultDetailSchema:
+    ) -> Union[JSONAPIResultDetailSchema, Dict]:
         dl: "BaseDataLayer" = await self.get_data_layer(extra_view_deps)
-        return await self.process_update_object(dl=dl, obj_id=obj_id, data_update=data_update)
+        response = await self.process_update_object(dl=dl, obj_id=obj_id, data_update=data_update)
+        return handle_jsonapi_fields(response, self.query_params, self.jsonapi)
 
     async def process_update_object(
         self,

fastapi_jsonapi/views/list_view.py

@@ -1,11 +1,12 @@
 import logging
-from typing import TYPE_CHECKING, Any, Dict
+from typing import TYPE_CHECKING, Any, Dict, Union
 
 from fastapi_jsonapi.schema import (
     BaseJSONAPIItemInSchema,
     JSONAPIResultDetailSchema,
     JSONAPIResultListSchema,
 )
+from fastapi_jsonapi.views.utils import handle_jsonapi_fields
 from fastapi_jsonapi.views.view_base import ViewBase
 
 if TYPE_CHECKING:
@@ -34,21 +35,23 @@ async def get_data_layer(
     ) -> "BaseDataLayer":
         return await self.get_data_layer_for_list(extra_view_deps)
 
-    async def handle_get_resource_list(self, **extra_view_deps) -> JSONAPIResultListSchema:
+    async def handle_get_resource_list(self, **extra_view_deps) -> Union[JSONAPIResultListSchema, Dict]:
         dl: "BaseDataLayer" = await self.get_data_layer(extra_view_deps)
         query_params = self.query_params
         count, items_from_db = await dl.get_collection(qs=query_params)
         total_pages = self._calculate_total_pages(count)
 
-        return self._build_list_response(items_from_db, count, total_pages)
+        response = self._build_list_response(items_from_db, count, total_pages)
+        return handle_jsonapi_fields(response, query_params, self.jsonapi)
 
     async def handle_post_resource_list(
         self,
         data_create: BaseJSONAPIItemInSchema,
         **extra_view_deps,
-    ) -> JSONAPIResultDetailSchema:
+    ) -> Union[JSONAPIResultDetailSchema, Dict]:
         dl: "BaseDataLayer" = await self.get_data_layer(extra_view_deps)
-        return await self.process_create_object(dl=dl, data_create=data_create)
+        response = await self.process_create_object(dl=dl, data_create=data_create)
+        return handle_jsonapi_fields(response, self.query_params, self.jsonapi)
 
     async def process_create_object(self, dl: "BaseDataLayer", data_create: BaseJSONAPIItemInSchema):
         created_object = await dl.create_object(data_create=data_create, view_kwargs={})
@@ -68,4 +71,5 @@ async def handle_delete_resource_list(self, **extra_view_deps) -> JSONAPIResultL
 
         await dl.delete_objects(items_from_db, {})
 
-        return self._build_list_response(items_from_db, count, total_pages)
+        response = self._build_list_response(items_from_db, count, total_pages)
+        return handle_jsonapi_fields(response, self.query_params, self.jsonapi)