[FIX + REPORT BUG] node.metadata in json from postgresql.

gargantext_web/api.py

 from django.http import HttpResponseNotFound, HttpResponse, Http404
 from django.core.exceptions import PermissionDenied, SuspiciousOperation
 from django.core.exceptions import ValidationError
+from django.core.urlresolvers import reverse
 
 from django.db.models import Avg, Max, Min, Count, Sum
 # from node.models import Language, ResourceType, Resource
@@ -10,6 +11,8 @@ from sqlalchemy import text, distinct
 from sqlalchemy.sql import func
 from sqlalchemy.orm import aliased
 
+import json
+
 from .db import *
 
 
@@ -578,7 +581,8 @@ class Nodes(APIView):
             'id': node.id,
             'name': node.name,
             # 'type': node.type__name,
-            'metadata': dict(node.metadata),
+            #'metadata': dict(node.metadata),
+            'metadata': node.metadata,
         })
 
     # deleting node by id

gargantext_web/views.py

@@ -619,8 +619,8 @@ def node_link(request, corpus_id):
 
     data = []
     
-    corpus = Node.objects.get(id=corpus_id)
-    filename = MEDIA_ROOT + '/corpora/%s/%s_%s.json' % (request.user , corpus.parent.id, corpus_id)
+    corpus = session.query(Node).filter(Node.id==corpus_id).first()
+    filename = MEDIA_ROOT + '/corpora/%s/%s_%s.json' % (request.user , corpus.parent_id, corpus_id)
     print("file exists?:",os.path.isfile(filename))
     if os.path.isfile(filename):
         json_data = open(filename,"r")