1 from manifold.core.query import Query
2 from manifoldapi.manifoldapi import execute_query
4 from django.http import HttpResponse
11 # handles serialization of datetime in json
12 DateEncoder = lambda obj: obj.strftime("%B %d, %Y %H:%M:%S") if isinstance(obj, datetime.datetime) else None
14 # support converting decimal in json
15 json.encoder.FLOAT_REPR = lambda o: format(o, '.2f')
17 # handles decimal numbers serialization in json
18 class DecimalEncoder(json.JSONEncoder):
19 def _iterencode(self, o, markers=None):
20 if isinstance(o, decimal.Decimal):
21 return (str(o) for o in [o])
22 return super(DecimalEncoder, self)._iterencode(o, markers)
24 class ObjectRequest(object):
26 def __init__(self, request, object_type, object_name):
27 self.type = object_type
28 self.name = object_name
34 self.request = request
36 if ((self.type == 'platform') or (self.type == 'testbed')) :
37 self.type = 'local:platform'
39 self.fields = ['platform', 'platform_longname', 'platform_url', 'platform_description','gateway_type'];
40 self.filters['disabled'] = '0'
41 self.filters['gateway_type'] = 'sfa'
42 self.filters['platform'] = '!myslice'
49 # What about key formed of multiple fields???
50 query = Query.get('local:object').filter_by('table', '==', self.type).select('key')
51 results = execute_query(self.request, query)
52 print "key of object = %s" % results
54 for r in results[0]['key'] :
57 raise Exception, 'Manifold db error'
59 def setLocalFields(self):
60 query = Query.get('local:object').filter_by('table', '==', self.type).select('column.name')
61 results = execute_query(self.request, query)
63 for r in results[0]['column'] :
64 self.fields.append(r['name'])
66 raise Exception, 'Manifold db error'
68 def setFields(self, fields):
69 # selected_fields = []
71 # if p in self.fields :
72 # selected_fields.append(p)
76 def applyFilters(self, query, force_filters = False):
77 if (force_filters and not self.filters) :
78 raise Exception, "Filters required"
80 for k, f in self.filters.iteritems() :
82 query.filter_by(k, '!=', f[1:])
83 elif (f[:2] == ">=") :
84 query.filter_by(k, '>=', f[2:])
86 query.filter_by(k, '>', f[1:])
87 elif (f[:2] == "<=") :
88 query.filter_by(k, '<=', f[2:])
90 query.filter_by(k, '<', f[1:])
92 query.filter_by(k, '==', f)
96 query = Query.get(self.type)
97 if (self.id not in self.fields) :
98 query.select(self.fields + [self.id])
100 query.select(self.fields)
102 query = self.applyFilters(query)
103 return execute_query(self.request, query)
106 query = Query.create(self.type)
107 # No filters for create
109 query.set(self.params)
111 raise Exception, "Params are required for create"
112 return execute_query(self.request, query)
115 query = Query.update(self.type)
116 query = self.applyFilters(query, True)
117 print ">>>>>",self.params
120 query.set({ 'resource' : self.params})
121 # for param in self.params :
124 raise Exception, "Params are required for update"
126 return execute_query(self.request, query)
129 query = Query.delete(self.type)
130 query = self.applyFilters(query, True)
132 query.set(self.filters)
134 raise Exception, "Filters are required for update"
135 return execute_query(self.request, query)
138 return HttpResponse(json.dumps(self.get(), cls=DecimalEncoder, default=DateEncoder), content_type="application/json")
141 response = self.get()
143 response_data['fields'] = self.fields
144 response_data['labels'] = self.fields
145 response_data['data'] = []
146 response_data['total'] = len(response)
149 for p in self.fields :
151 response_data['data'].append(d)
153 return HttpResponse(json.dumps(response_data, cls=DecimalEncoder, default=DateEncoder), content_type="application/json")
156 return HttpResponse(json.dumps({'error' : msg}), content_type="application/json")
159 return HttpResponse(json.dumps({'success' : msg}), content_type="application/json")