def initial(self, request):
"""
Before dispatching to put(), delete()...
1) Checks current user authentication to prevent remote DB manipulation
2) Prepares self.list_objects from params
"""
if not request.user.is_authenticated():
raise Http404()
# can't use return in initial() (although 401 maybe better than 404)
# can't use @requires_auth because of positional 'self' within class
# get validated params
self.params = get_parameters(request)
(self.base_list, self.change_list) = ListChange._validate(self.params)
if not len(self.change_list.items):
payload_ngrams = request.data['ngrams']
# print("no change_list in params but we got:", payload_ngrams)
# change_list can be in payload too
change_ngram_ids = [int(n) for n in payload_ngrams.split(',')]
if (not len(change_ngram_ids)):
raise ValidationException(
'The "ngrams" parameter requires one or more ngram_ids separated by comma'
)
else:
self.change_list = UnweightedList(change_ngram_ids)
def get(self, request):
parameters = get_parameters(request)
maplist_id = None
scores_id = None
if "corpus" in parameters:
corpus_id = parameters['corpus']
corpus = cache.Node[corpus_id]
maplist_id = corpus.children('MAPLIST').first().id
# with a corpus_id, the explicit scoring pointer is optional
if "scoring" in parameters:
scores_id = parameters['scoring']
else:
scores_id = corpus.children('OCCURRENCES').first().id
elif "maplist" in parameters and "scoring" in parameters:
maplist_id = int(parameters['mainlist'])
scores_id = int(parameters['scoring'])
else:
raise ValidationException("A 'corpus' id or 'maplist' id is required, and a 'scoring' for occurences counts")
ngraminfo = {} # ngram details sorted per ngram id
listmembers = {'maplist':[]} # ngram ids sorted per list name
# infos for all ngrams from maplist
map_ngrams = query_list(maplist_id, details=True,
scoring_metric_id= scores_id).all()
# ex: [(8805, 'mean age', 4.0),
# (1632, 'activity', 4.0),
# (8423, 'present', 2.0),
# (2928, 'objective', 2.0)]
# shortcut to useful function during loop
add_to_members = listmembers['maplist'].append
for ng in map_ngrams:
ng_id = ng[0]
ngraminfo[ng_id] = ng[1:]
# maplist ngrams will already be <=> ngraminfos
# but the client side expects a membership lookup
# as when there are multiple lists or some groupings
add_to_members(ng_id)
return JsonHttpResponse({
'ngraminfos' : ngraminfo,
'listmembers' : listmembers,
'links' : {}, # no grouping links sent during glance (for speed)
'nodeids' : {
'mainlist': None,
'maplist' : maplist_id,
'stoplist': None,
'groups': None,
'scores': None,
}
})
def get(self, request, corpus_id):
if not request.user.is_authenticated():
# can't use @requires_auth because of positional 'self' within class
return HttpResponse('Unauthorized', status=401)
parameters = get_parameters(request)
parameters = validate(parameters, {'score': str, 'ngram_ids': list})
try:
ngram_ids = [int(n) for n in parameters['ngram_ids'].split(',')]
except:
raise ValidationException(
'"ngram_ids" needs integers separated by comma.')
limit = DEFAULT_N_DOCS_HAVING_NGRAM
nodes_list = []
corpus = session.query(Node).filter(Node.id == corpus_id).first()
tfidf_id = (session.query(Node.id).filter(
Node.typename == "TFIDF-CORPUS",
Node.parent_id == corpus.id).first())
tfidf_id = tfidf_id[0]
print(tfidf_id)
# request data
nodes_query = (session.query(Node, func.sum(NodeNodeNgram.score)).join(
NodeNodeNgram, NodeNodeNgram.node2_id == Node.id).filter(
NodeNodeNgram.node1_id == tfidf_id).filter(
Node.typename == 'DOCUMENT',
Node.parent_id == corpus.id).filter(
or_(*[
NodeNodeNgram.ngram_id == ngram_id
for ngram_id in ngram_ids
])).group_by(Node))
# get the total count before applying limit
nodes_count = nodes_query.count()
# now the query with the limit
nodes_results_query = (nodes_query.order_by(
func.sum(NodeNodeNgram.score).desc()).limit(limit))
for node, score in nodes_results_query:
print(node, score)
print("\t corpus:", corpus_id, "\t", node.name)
node_dict = {
'id': node.id,
'score': score,
}
for key in ('title', 'publication_date', 'source', 'authors',
'fields'):
if key in node.hyperdata:
node_dict[key] = node.hyperdata[key]
nodes_list.append(node_dict)
return JsonHttpResponse({'count': nodes_count, 'records': nodes_list})
def put(self, request, corpus_id, check_each_doc=True):
if not request.user.is_authenticated():
# can't use @requires_auth because of positional 'self' within class
return HttpResponse('Unauthorized', status=401)
# user is ok
fav_node = self._get_fav_node(corpus_id)
response = {}
if fav_node == None:
response = {
'warning':
'No favorites node is defined for this corpus (\'%s\')' %
self.corpus.name,
'count_added':
0
}
else:
req_params = validate(get_parameters(request), {
'docs': list,
'default': ""
})
nodeids_to_add = [
int(did) for did in req_params['docs'].split(',')
]
if check_each_doc:
# verification que ce sont bien des documents du bon corpus
# un peu long => désactiver par défaut ?
known_docs_q = (session.query(
Node.id).filter(Node.parent_id == corpus_id).filter(
Node.typename == 'DOCUMENT'))
lookup = {
known_doc.id: True
for known_doc in known_docs_q.all()
}
# debug
# print("lookup hash", lookup)
rejected_list = []
for doc_node_id in nodeids_to_add:
if (doc_node_id not in lookup):
rejected_list.append(doc_node_id)
if len(rejected_list):
raise ValidationException(
"Error on some requested docs: %s (Only nodes of type 'doc' AND belonging to corpus %i can be added to favorites.)"
% (str(rejected_list), int(corpus_id)))
# add them
bulk_insert(NodeNode, ('node1_id', 'node2_id', 'score'),
((fav_node.id, doc_node_id, 1.0)
for doc_node_id in nodeids_to_add))
# todo count really added (here: counts input param not result)
response = {'count_added': len(nodeids_to_add)}
return JsonHttpResponse(response)
def _validate(params):
"""
Checks "list" and "ngrams" parameters for their:
- presence
- type
These two parameters are mandatory for any ListChange methods.
ngrams are also converted to an UnweightedList object for easy add/remove
"""
if 'list' not in params:
raise ValidationException(
'The route /api/ngramlists/change requires a "list" \
parameter, for instance /api/ngramlists/change?list_id=42'
)
# if 'ngrams' not in params:
# raise ValidationException('The route /api/ngramlists/change requires an "ngrams"\
# parameter, for instance /api/ngramlists/change?ngrams=1,2,3,4')
# 2 x retrieval => 2 x UnweightedLists
# ------------------------------------
base_list_id = None
try:
base_list_id = int(params['list'])
# UnweightedList retrieved by id
except:
raise ValidationException(
'The "list" parameter requires an existing list id.')
base_list = UnweightedList(base_list_id)
change_ngram_ids = []
try:
change_ngram_ids = [int(n) for n in params['ngrams'].split(',')]
# UnweightedList created from items
except:
# ngrams no longer mandatory inline, see payload check afterwards
pass
change_list = UnweightedList(change_ngram_ids)
return (base_list, change_list)
def get(self, request, node_id):
# check that the node is a corpus
# ? faster from cache than: corpus = session.query(Node)...
if not request.user.is_authenticated():
# can't use @requires_auth because of positional 'self' within class
return HttpResponse('Unauthorized', status=401)
corpus = cache.Node[node_id]
if corpus.typename != 'CORPUS':
raise ValidationException(
"Only nodes of type CORPUS can accept facet queries" +
" (but this node has type %s)..." % corpus.typename)
else:
self.corpus = corpus
# check that the hyperfield parameter makes sense
_facet_available_subfields = [
'source', 'publication_year', 'rubrique', 'language_iso2',
'language_iso3', 'language_name', 'authors'
]
parameters = get_parameters(request)
# validate() triggers an info message if subfield not in range
parameters = validate(
parameters, {
'type': dict,
'items': {
'hyperfield': {
'type': str,
'range': _facet_available_subfields
}
}
})
subfield = parameters['hyperfield']
# do the aggregated sum
(xcounts, total) = self._ndocs_by_facet(subfield)
# response
return JsonHttpResponse({
'doc_count': total,
'by': {
subfield: xcounts
}
})
def _get_fav_node(self, corpus_id):
"""
NB: fav_node can be None if no node is defined
this query could be faster if we didn't check that corpus_id is a CORPUS
ie: session.query(Node)
.filter(Node.parent_id==corpus_id)
.filter(Node.typename =='FAVORITES')
"""
corpus = cache.Node[corpus_id]
if corpus.typename != 'CORPUS':
raise ValidationException(
"Only nodes of type CORPUS can accept favorites queries" +
" (but this node has type %s)..." % corpus.typename)
else:
self.corpus = corpus
fav_node = self.corpus.children('FAVORITES').first()
return fav_node
def delete(self, request):
"""Removes the list of nodes corresponding to the query.
TODO : Should be a delete method!
"""
if not request.user.is_authenticated():
# can't use @requires_auth because of positional 'self' within class
return HttpResponse('Unauthorized', status=401)
parameters = get_parameters(request)
parameters = validate(parameters, {'ids': list})
try:
node_ids = [int(n) for n in parameters['ids'].split(',')]
except:
raise ValidationException(
'"ids" needs integers separated by comma.')
result = session.execute(delete(Node).where(Node.id.in_(node_ids)))
session.commit()
return JsonHttpResponse({'deleted': result.rowcount})
def patch(self, request, corpusnode_id):
"""
PATCH triggers recount of metrics for the specified corpus.
ex PATCH http://localhost:8000/api/metrics/14072
-----
corpus_id
"""
print("==> update metrics request on ", corpusnode_id)
if not request.user.is_authenticated():
# can't use @requires_auth because of positional 'self' within class
return HttpResponse('Unauthorized', status=401)
try:
corpus = cache.Node[int(corpusnode_id)]
except:
corpus = None
if corpus is None:
raise ValidationException("%s is not a valid corpus node id." %
corpusnode_id)
else:
t_before = datetime.now()
# =============
scheduled(recount)(corpus.id)
# =============
t_after = datetime.now()
return JsonHttpResponse({
'corpus_id':
corpusnode_id,
'took':
"%f s." % (t_after - t_before).total_seconds()
})
def _query_nodes(request, node_id=None):
if request.user.id is None:
raise TypeError(
"This API request must come from an authenticated user.")
else:
# we query among the nodes that belong to this user
user = cache.User[request.user.id]
# parameters validation
# fixme: this validation does not allow custom keys in url (eg '?name=' for rename action)
parameters = get_parameters(request)
parameters = validate(
parameters,
{
'type': dict,
'items': {
'formated': {
'type': str,
'required': False,
'default': 'json'
},
'pagination_limit': {
'type': int,
'default': 10
},
'pagination_offset': {
'type': int,
'default': 0
},
'fields': {
'type': list,
'default': _node_default_fields,
'items': {
'type': str,
'range': _node_available_fields,
}
},
# choice of hyperdata fields
'hyperdata_filter': {
'type': list,
'required': False,
'items': {
'type': str,
'range': _hyperdata_available_fields,
}
},
# optional filtering parameters
'types': {
'type': list,
'required': False,
'items': {
'type': str,
'range': _node_available_types,
}
},
'parent_id': {
'type': int,
'required': False
},
}
})
# debug
# print('PARAMS', parameters)
# additional validation for hyperdata_filter
if (('hyperdata_filter' in parameters)
and (not ('hyperdata' in parameters['fields']))):
raise ValidationException(
"Using the hyperdata_filter filter requires fields[]=hyperdata")
# start the query
query = user.nodes()
# filter by id
if node_id is not None:
query = query.filter(Node.id == node_id)
# filter by type
if 'types' in parameters:
query = query.filter(Node.typename.in_(parameters['types']))
# filter by parent
if 'parent_id' in parameters:
query = query.filter(Node.parent_id == parameters['parent_id'])
# count
count = query.count()
# order
query = query.order_by(Node.hyperdata['publication_date'], Node.id)
# paginate the query
if parameters['pagination_limit'] == -1:
query = query[parameters['pagination_offset']:]
else:
query = query[
parameters['pagination_offset']:parameters['pagination_limit']]
# return the result!
# (the receiver function does the filtering of fields and hyperdata_filter)
return parameters, query, count
def validate(value, expected, path='input'):
# Is the expected type respected?
if 'type' in expected:
expected_type = expected['type']
if not isinstance(value, expected_type):
if expected_type in (bool, int, float, str, datetime, ):
try:
if expected_type == bool:
value = value not in {0, 0.0, '', '0', 'false'}
elif expected_type == datetime:
value = value + '2000-01-01T00:00:00Z'[len(value):]
value = datetime.strptime(value, '%Y-%m-%dT%H:%M:%SZ')
else:
value = expected_type(value)
except ValueError:
raise ValidationException('%s should be a JSON %s, but could not be parsed as such' % (path, _types_names[expected_type], ))
else:
raise ValidationException('%s should be a JSON %s' % (path, _types_names[expected_type], ))
else:
expected_type = type(value)
# Is the value in the expected range?
if 'range' in expected:
expected_range = expected['range']
if isinstance(expected_range, tuple):
if expected_type in (int, float):
tested_value = value
tested_name = 'value'
elif expected_type in (str, list):
tested_value = len(value)
tested_name = 'length'
if tested_value < expected_range[0]:
raise ValidationException('%s should have a minimum %s of %d' % (path, tested_name, expected_range[0], ))
if len(expected_range) > 1 and tested_value > expected_range[1]:
raise ValidationException('%s should have a maximum %s of %d' % (path, tested_name, expected_range[1], ))
elif isinstance(expected_range, (list, set, )) and value not in expected_range:
expected_values = expected_range if isinstance(expected_range, list) else expected_range
expected_values = [str(value) for value in expected_values if isinstance(value, expected_type)]
if len(expected_values) < 16:
expected_values_str = '", "'.join(expected_values)
expected_values_str = '"' + expected_values_str + '"'
else:
expected_values_str = '", "'.join(expected_values[:16])
expected_values_str = '"' + expected_values_str + '"...'
raise ValidationException('%s should take one of the following values: %s' % (path, expected_values_str, ))
# Do we have to translate through a dictionary?
if 'translate' in expected:
translate = expected['translate']
if callable(translate):
value = translate(value)
if value is None and expected.get('required', False):
raise ValidationException('%s has been given an invalid value' % (path, ))
return value
try:
value = expected['translate'][value]
except KeyError:
if expected.get('translate_fallback_keep', False):
return value
if expected.get('required', False):
raise ValidationException('%s has been given an invalid value' % (path, ))
else:
return expected.get('default', value)
# Are we handling an iterable?
if expected_type in (list, dict):
if 'items' in expected:
expected_items = expected['items']
if expected_type == list:
for i, element in enumerate(value):
value[i] = validate(element, expected_items, '%s[%d]' % (path, i, ))
elif expected_type == dict:
if expected_items:
for key in value:
if key not in expected_items:
raise ValidationException('%s should not have a "%s" key.' % (path, key, ))
for expected_key, expected_value in expected_items.items():
if expected_key in value:
value[expected_key] = validate(value[expected_key], expected_value, '%s["%s"]' % (path, expected_key, ))
elif 'required' in expected_value and expected_value['required']:
raise ValidationException('%s should have a "%s" key.' % (path, expected_key, ))
elif 'default' in expected_value:
value[expected_key] = expected_value['default']
# Let's return the proper value!
return value
def get(self, request):
parameters = get_parameters(request)
glance_limit = None
mainlist_id = None
scores_id = None
groups_id = None
other_list_ids = {'maplist': None, 'stoplist': None}
# 1) retrieve a mainlist_id and other lists
##########################################
# simple request: just refers to the parent corpus
# ------------------------------------------------
if "corpus" in parameters:
corpus_id = parameters['corpus']
corpus = cache.Node[corpus_id]
# with a corpus_id, the explicit scoring pointer is optional
if "scoring" in parameters:
scores_id = parameters['scoring']
else:
scores_id = corpus.children('OCCURRENCES').first().id
# retrieve the family of lists that have corpus as parent
mainlist_id = corpus.children('MAINLIST').first().id
groups_id = corpus.children('GROUPLIST').first().id
other_list_ids['stoplist'] = corpus.children('STOPLIST').first().id
other_list_ids['maplist'] = corpus.children('MAPLIST').first().id
# custom request: refers to each list individually
# -------------------------------------------------
elif "mainlist" in parameters and "scoring" in parameters:
mainlist_id = parameters['mainlist']
scores_id = parameters['scoring']
groups_id = None
if 'groups' in parameters:
groups_id = parameters['scoring']
for k in ['stoplist', 'maplist']:
if k in parameters:
other_list_ids[k] = parameters[k]
# or request has an error
# -----------------------
else:
raise ValidationException(
"Either a 'corpus' parameter or 'mainlist' & 'scoring' params are required"
)
# 2) get the infos for each list
################################
ngraminfo = {} # ngram details sorted per ngram id
linkinfo = {} # ngram groups sorted per ngram id
listmembers = {} # ngram ids sorted per list name
if "head" in parameters:
# head <=> only mainlist AND only k top ngrams
glance_limit = int(parameters['head'])
mainlist_query = query_list(mainlist_id,
details=True,
pagination_limit=glance_limit,
scoring_metric_id=scores_id)
else:
# infos for all ngrams from mainlist
mainlist_query = query_list(mainlist_id,
details=True,
scoring_metric_id=scores_id)
# infos for grouped ngrams, absent from mainlist
hidden_ngrams_query = query_grouped_ngrams(groups_id, details=True)
# infos for stoplist terms, absent from mainlist
stop_ngrams_query = query_list(other_list_ids['stoplist'],
details=True,
scoring_metric_id=scores_id)
# and for the other lists (stop and map)
# no details needed here, just the member ids
for li in other_list_ids:
li_elts = query_list(other_list_ids[li], details=False).all()
# simple array of ngram_ids
listmembers[li] = [ng[0] for ng in li_elts]
# and the groupings
if groups_id:
links = Translations(groups_id)
linkinfo = links.groups
# list of
ngrams_which_need_detailed_info = []
if "head" in parameters:
# head triggered simplified form: just the top of the mainlist
# TODO add maplist membership
ngrams_which_need_detailed_info = mainlist_query.all()
else:
ngrams_which_need_detailed_info = mainlist_query.all(
) + hidden_ngrams_query.all() + stop_ngrams_query.all()
# the output form of details is:
# ngraminfo[id] => [term, weight]
for ng in ngrams_which_need_detailed_info:
ng_id = ng[0]
ngraminfo[ng_id] = ng[1:]
# NB the client js will sort mainlist ngs from hidden ngs after ajax
# using linkinfo (otherwise needs redundant listmembers for main)
return JsonHttpResponse({
'ngraminfos': ngraminfo,
'listmembers': listmembers,
'links': linkinfo,
'nodeids': {
'mainlist': mainlist_id,
'maplist': other_list_ids['maplist'],
'stoplist': other_list_ids['stoplist'],
'groups': groups_id,
'scores': scores_id,
}
})
def put(self, request):
"""
Basic external access for *creating an ngram*
---------------------------------------------
1 - checks user authentication before any changes
2 - checks if ngram to Ngram table in DB
if yes returns ngram_id and optionally mainform_id
otherwise continues
3 - adds the ngram to Ngram table in DB
4 - (if corpus param is present)
adds the ngram doc counts to NodeNgram table in DB
(aka "index the ngram" throught the docs of the corpus)
5 - returns json with:
'msg' => a success msg
'text' => the initial text content
'term' => the normalized text content
'id' => the new ngram_id
'count' => the number of docs with the ngram in the corpus
(if corpus param is present)
'group' => the mainform_id if applicable
possible inline parameters
--------------------------
@param text=<ngram_string> [required]
@param corpus=<CORPUS_ID> [optional]
@param testgroup (true if present) [optional, requires corpus]
"""
# 1 - check user authentication
if not request.user.is_authenticated():
res = HttpResponse("Unauthorized")
res.status_code = 401
return res
# the params
params = get_parameters(request)
print("PARAMS", [(i,v) for (i,v) in params.items()])
if 'text' in params:
original_text = str(params.pop('text'))
ngram_str = normalize_forms(normalize_chars(original_text))
else:
raise ValidationException('The route PUT /api/ngrams/ is used to create a new ngram\
It requires a "text" parameter,\
for instance /api/ngrams?text=hydrometallurgy')
if ('testgroup' in params) and (not ('corpus' in params)):
raise ValidationException("'testgroup' param requires 'corpus' param")
# if we have a 'corpus' param (to do the indexing)...
do_indexation = False
if 'corpus' in params:
# we retrieve the corpus...
corpus_id = int(params.pop('corpus'))
corpus_node = cache.Node[corpus_id]
# and the user must also have rights on the corpus
if request.user.id == corpus_node.user_id:
do_indexation = True
else:
res = HttpResponse("Unauthorized")
res.status_code = 401
return res
# number of "words" in the ngram
ngram_size = len(findall(r' +', ngram_str)) + 1
# do the additions
try:
log_msg = ""
ngram_id = None
mainform_id = None
preexisting = session.query(Ngram).filter(Ngram.terms==ngram_str).first()
if preexisting is not None:
ngram_id = preexisting.id
log_msg += "ngram already existed (id %i)\n" % ngram_id
# in the context of a corpus we can also check if has mainform
# (useful for)
if 'testgroup' in params:
groupings_id = (session.query(Node.id)
.filter(Node.parent_id == corpus_id)
.filter(Node.typename == 'GROUPLIST')
.first()
)
had_mainform = (session.query(NodeNgramNgram.ngram1_id)
.filter(NodeNgramNgram.node_id == groupings_id)
.filter(NodeNgramNgram.ngram2_id == preexisting.id)
.first()
)
if had_mainform:
mainform_id = had_mainform[0]
log_msg += "ngram had mainform (id %i) in this corpus" % mainform_id
else:
log_msg += "ngram was not in any group for this corpus"
else:
# 2 - insert into Ngrams
new_ngram = Ngram(terms=ngram_str, n=ngram_size)
session.add(new_ngram)
session.commit()
ngram_id = new_ngram.id
log_msg += "ngram was added with new id %i\n" % ngram_id
# 3 - index the term
if do_indexation:
n_added = index_new_ngrams([ngram_id], corpus_node)
log_msg += 'ngram indexed in corpus %i\n' % corpus_id
return JsonHttpResponse({
'msg': log_msg,
'text': original_text,
'term': ngram_str,
'id' : ngram_id,
'group' : mainform_id,
'count': n_added if do_indexation else 'no corpus provided for indexation'
}, 200)
# just in case
except Exception as e:
return JsonHttpResponse({
'msg': str(e),
'text': original_text
}, 400)