[FEAT] added a new resource to the API: `/api/nodes/(\d+)`

[FEAT] deletions now cascade

gargantext/models/ngrams.py

@@ -17,6 +17,6 @@ class Ngram(Base):
 class NodeNgram(Base):
     __tablename__ = 'nodes_ngrams'
     id = Column(Integer)
-    node_id = Column(Integer, ForeignKey(Node.id), primary_key=True)
-    ngram_id = Column(Integer, ForeignKey(Ngram.id), primary_key=True)
+    node_id = Column(Integer, ForeignKey(Node.id, ondelete='CASCADE'), primary_key=True)
+    ngram_id = Column(Integer, ForeignKey(Ngram.id, ondelete='CASCADE'), primary_key=True)
     weight = Column(Float)

gargantext/models/nodes.py

@@ -25,8 +25,9 @@ class Node(Base):
     __tablename__ = 'nodes'
     id = Column(Integer, primary_key=True)
     typename = Column(NodeType, index=True)
-    user_id = Column(Integer, ForeignKey(User.id))
-    parent_id = Column(Integer, ForeignKey('nodes.id'))
+    # foreign keys
+    user_id = Column(Integer, ForeignKey(User.id, ondelete='CASCADE'))
+    parent_id = Column(Integer, ForeignKey('nodes.id', ondelete='CASCADE'))
     # main data
     name = Column(String(255))
     date  = Column(DateTime(), default=datetime.now)

gargantext/views/api/nodes.py

 from gargantext.util.http import *
 from gargantext.util.db import *
+from gargantext.util.db_cache import *
 from gargantext.models import *
 from gargantext.constants import *
 
 from gargantext.util.validation import validate
 
 
-class NodesList(APIView):
+class NodeListResource(APIView):
 
     _fields = ['id', 'parent_id', 'name', 'typename', 'hyperdata']
     _types = NODETYPES
@@ -52,7 +53,6 @@ class NodesList(APIView):
         # return the result!
         return parameters, query, count
 
-
     def get(self, request):
         """Displays the list of nodes corresponding to the query.
         """
@@ -75,3 +75,32 @@ class NodesList(APIView):
             'parameters': parameters,
             'count': count,
         }, 200)
+
+class NodeResource(APIView):
+
+    def _query(self, request, node_id):
+        user = cache.User[request.user.username]
+        node = session.query(Node).filter(Node.id == node_id).first()
+        if node is None:
+            raise Http404()
+        if not user.owns(node):
+            raise HttpResponseForbidden()
+        return user, node
+
+    def get(self, request, node_id):
+        from sqlalchemy import delete
+        user, node = self._query(request, node_id)
+        return JsonHttpResponse({
+            'id': node.id,
+            'parent_id': node.parent_id,
+            'name': node.name,
+            'hyperdata': node.hyperdata,
+        })
+
+    def delete(self, request, node_id):
+        user, node = self._query(request, node_id)
+        result = session.execute(
+            delete(Node).where(Node.id == node_id)
+        )
+        session.commit()
+        return JsonHttpResponse({'deleted': result.rowcount})

gargantext/views/api/urls.py

@@ -4,5 +4,6 @@ from . import nodes
 
 
 urlpatterns = [
-    url(r'^nodes$', nodes.NodesList.as_view()),
+    url(r'^nodes$', nodes.NodeListResource.as_view()),
+    url(r'^nodes/(\d+)$', nodes.NodeResource.as_view()),
 ]