Python func.count函数代码示例

    def test_migrate_batch_stureg(self):
        batch_guid = '2bb942b9-75cf-4055-a67a-8b9ab53a9dfc'
        batch = {UdlStatsConstants.REC_ID: '6',
                 UdlStatsConstants.BATCH_GUID: batch_guid, UdlStatsConstants.TENANT: self.__tenant,
                 UdlStatsConstants.SCHEMA_NAME: None, Constants.DEACTIVATE: False,
                 UdlStatsConstants.LOAD_TYPE: LoadType.STUDENT_REGISTRATION,
                 UdlStatsConstants.BATCH_OPERATION: 's',
                 UdlStatsConstants.SNAPSHOT_CRITERIA: '{"reg_system_id": "015247bd-058c-48cd-bb4d-f6cffe5b40c1", "academic_year": 2015}'}
        self.insert_into_udl_stats(batch[UdlStatsConstants.REC_ID], batch_guid, self.__tenant, batch[UdlStatsConstants.LOAD_TYPE])

        preprod_conn = EdMigrateSourceConnection(tenant=get_unittest_preprod_tenant_name())
        count_to_source_query = select([func.count()]).select_from(preprod_conn.get_table(Constants.STUDENT_REG))
        count_to_be_inserted = preprod_conn.execute(count_to_source_query).fetchall()[0][0]
        self.assertEqual(10, count_to_be_inserted)

        prod_conn = EdMigrateDestConnection(tenant=get_unittest_preprod_tenant_name())
        student_reg_table = prod_conn.get_table(Constants.STUDENT_REG)
        count_query = select([func.count()]).select_from(student_reg_table)
        count_before = prod_conn.execute(count_query).fetchall()[0][0]
        self.assertEqual(2581, count_before)

        count_snapshot_query = select([func.count()], student_reg_table.c.academic_year == 2015).select_from(student_reg_table)
        count_to_be_deleted = prod_conn.execute(count_snapshot_query).fetchall()[0][0]
        self.assertEqual(1217, count_to_be_deleted)

        rtn = migrate_batch(batch)
        self.assertTrue(rtn)

        expected_count_after = count_before - count_to_be_deleted + count_to_be_inserted
        count_after = prod_conn.execute(count_query).fetchall()[0][0]
        self.assertEqual(expected_count_after, count_after)

 def get_community_tags(self, item=None, limit=None):
     """Returns community tags for an item."""
     # Get item-tag association class.
     item_class = item.__class__
     item_tag_assoc_class = self.get_tag_assoc_class(item_class)
     if not item_tag_assoc_class:
         return []
     # Build select statement.
     cols_to_select = [item_tag_assoc_class.table.c.tag_id, func.count('*')]
     from_obj = item_tag_assoc_class.table.join(item_class.table).join(galaxy.model.Tag.table)
     where_clause = (self.get_id_col_in_item_tag_assoc_table(item_class) == item.id)
     order_by = [func.count("*").desc()]
     group_by = item_tag_assoc_class.table.c.tag_id
     # Do query and get result set.
     query = select(columns=cols_to_select,
                    from_obj=from_obj,
                    whereclause=where_clause,
                    group_by=group_by,
                    order_by=order_by,
                    limit=limit)
     result_set = self.sa_session.execute(query)
     # Return community tags.
     community_tags = []
     for row in result_set:
         tag_id = row[0]
         community_tags.append(self.get_tag_by_id(tag_id))
     return community_tags

 def dataset_counts(cls, datasets_q):
     sq = datasets_q.subquery()
     q = select([cls.code, func.count(cls.dataset_id)],
                group_by=cls.code,
                order_by=func.count(cls.dataset_id).desc())
     q = q.where(cls.dataset_id == sq.c.id)
     return db.session.bind.execute(q).fetchall()

    def clientstats(db):
        startdatestring = request.json['startdate']
        enddatestring = request.json['enddate']
        dateformat = '%d-%m-%Y'

        startdate = datetime.strptime(startdatestring, dateformat)
        enddate = datetime.strptime(enddatestring, dateformat)

        selectedRequestsBrowser = db.query(Request.browsername, func.count(Request.browsername)).filter_by(isPageview=True).filter(Request.datetime.between(startdate, enddate)).group_by(Request.browsername)
        selectedRequestsPlatform = db.query(Request.platformname, func.count(Request.platformname)).filter_by(isPageview=True).filter(Request.datetime.between(startdate, enddate)).group_by(Request.platformname)

        returnDict = {'postdata' : request.json, 'returndata' : {'browserstats' : [], 'platformstats' : []}}

        for selectedRequestBrowser in selectedRequestsBrowser:
            tempDict = {'browser' : selectedRequestBrowser[0],
            'pageviews' : selectedRequestBrowser[1]}

            returnDict['returndata']['browserstats'].append(tempDict)

        for selectedRequestPlatform in selectedRequestsPlatform:
            tempDict = {'platform' : selectedRequestPlatform[0],
            'pageviews' : selectedRequestPlatform[1]}

            returnDict['returndata']['platformstats'].append(tempDict)

        return returnDict

    def by_filter(cls, session, opts, **kwargs):
        """
        Get packages from given filters.

        :param session: SQLAlchemy session
        :type session: :class:`sqlalchemy.Session`

        :param opts: filtering options
        :type opts: `dict

        :return: package instances
        :rtype: generator of :class:`pyshop.models.Package`
        """
        where = []

        if opts.get('local_only'):
            where.append(cls.local == True)

        if opts.get('names'):
            where.append(cls.name.in_(opts['names']))

        if opts.get('classifiers'):
            ids = [c.id for c in opts.get('classifiers')]
            cls_pkg = classifier__package
            qry = session.query(cls_pkg.c.package_id,
                                func.count('*'))
            qry = qry.filter(cls_pkg.c.classifier_id.in_(ids))
            qry = qry.group_by(cls_pkg.c.package_id)
            qry = qry.having(func.count('*') >= len(ids))
            where.append(cls.id.in_([r[0] for r in qry.all()]))

        return cls.find(session, where=where, **kwargs)

 def dataset_counts(cls, datasets):
     ds_ids = [d.id for d in datasets]
     if not len(ds_ids):
         return []
     q = select([cls.code, func.count(cls.dataset_id)],
                cls.dataset_id.in_(ds_ids), group_by=cls.code,
                order_by=func.count(cls.dataset_id).desc())
     return db.session.bind.execute(q).fetchall()

 def calculate_score(self, educatives, seminar):
     total_score = 0
     score = self.score
     ken_count = session.query(Educative.hug_id, Educative.ken_id, func.count(Educative.ken_id)).group_by(Educative.hug_id, Educative.ken_id).all()
     for ken in ken_count:
         total_score += (ken[2] ** 2) * score
     second_ken_count = session.query(Educative.hug_id, Educative.second_ken_id, func.count(Educative.second_ken_id)).group_by(Educative.hug_id, Educative.second_ken_id).all()
     for second_ken in second_ken_count:
         total_score += (second_ken[2] ** 2) * score
     return total_score

    def PageContent(self):
        results = dict()
        
        storySubselect = self.session.query(func.count(Story.idstory).label('storycount')).group_by(Story.categoryid).add_column(Story.categoryid).subquery()
        charSubselect = self.session.query(func.count(Character.idcharacter).label('charactercount')).group_by(Character.categoryid).add_column(Character.categoryid).subquery()

        query = self.session.query(Category, storySubselect.c.storycount, charSubselect.c.charactercount).order_by(Category.name)
        query = query.join((storySubselect, Category.idcategory == storySubselect.c.categoryid))
        query = query.join((charSubselect, Category.idcategory == charSubselect.c.categoryid))
        
        results['categories'] = [(r[0].name, r[1], r[2], self.request.route_url("search", category=r[0].idcategory)) for r in query]
        numPerRow = 3
        results['numPerRow'] = numPerRow
        results['rows'] = (len(results['categories'])/numPerRow) + 1
        return results

    def store_item(self, item, spider): # {{{
        item_table = self.table

        dbobj = {}
        for k,v in item.iteritems():
            if isinstance(v, list) or isinstance(v, dict):
                dbobj[k] = json.dumps(v)
            else:
                dbobj[k] = v

        conn = self.engine.connect()

        page_url = item['page_url']
        where = item_table.c.page_url == page_url
        sel = select([func.count(item_table.c.id)]).where(where)
        cnt = conn.execute(sel).scalar()
        if cnt:
            assert cnt==1, 'More than one item with page_url %s' % page_url
            upd = item_table.update().where(where)
            conn.execute(upd, dbobj)
            status = 'updated'
        else:
            ins = item_table.insert()
            conn.execute(ins, dbobj)
            status = 'inserted'
        log.msg('Item %s into %s: %s' % (status, item_table.name, page_url), level=log.DEBUG, spider=spider)

        conn.close()

    def get_sub_entries_count(self, identity = None, exclude_identity = None):
        """
Returns the number of child entries of this instance.

:param offset: SQLAlchemy query offset
:param limit: SQLAlchemy query limit
:param identity: Count only DataLinker children of the given identity
:param exclude_identity: Count only DataLinker children not be of the given identity

:return: (int) Number of child entries
:since:  v0.2.00
        """

        if (self.log_handler is not None): self.log_handler.debug("#echo(__FILEPATH__)# -{0!r}.get_sub_entries_count()- (#echo(__LINE__)#)", self, context = "pas_datalinker")

        if (identity is None and exclude_identity is None): _return = self.get_data_attributes("sub_entries")['sub_entries']
        elif (identity is not None and exclude_identity is not None): raise ValueException("Defining both an identity and to exclude an identity is not supported")
        else:
            with self:
                db_query = self.local.db_instance.rel_children.with_entities(sql.count(_DbDataLinker.id))

                if (identity is not None): db_query = db_query.filter(_DbDataLinker.identity == identity)
                elif (exclude_identity is not None): db_query = db_query.filter(_DbDataLinker.identity != exclude_identity)

                db_query = DataLinker._db_apply_id_site_condition(db_query)

                _return = db_query.scalar()
            #
        #

        return _return

 def rank(self):
     inner_team = aliased(Team)
     return (DBSession.query(func.count('*') + 1).
             select_from(inner_team).
             filter(inner_team.score > Team.score).
             correlate(Team).
             label('rank'))

 def count(self):
     """ Get a count of the number of distinct objects. """
     q = select(from_obj=self.join(self.alias))
     q = self.filter(q, partial=True)
     q = q.column(func.count(func.distinct(self.alias.c.id)).label('num'))
     rp = db.session.execute(q)
     return rp.fetchone().num

 def get_stats(cls):
     return dict(
         DBSession.query(Provider.pk, func.count(cls.ref_pk).label('c'))
         .filter(Provider.pk == cls.provider_pk)
         .group_by(Provider.pk)
         .order_by(desc('c'))
         .all())

def get_number_solved_subquery():
    """
    Get a subquery that returns how many teams have solved a challenge.

    Example usage:

        .. code-block:: python

            number_of_solved_subquery = get_number_solved_subquery()
            challenge_query = (DBSession.query(Challenge,
                                               number_of_solved_subquery)

    Here we query for a list of all challenges and additionally fetch the
    number of times it has been solved. This subquery will use the outer
    challenge to correlate on, so make sure to provide one or this query
    makes no sense.
    """
    from fluxscoreboard.models import dynamic_challenges
    query = (DBSession.query(func.count('*')).
             filter(Challenge.id == Submission.challenge_id).
             correlate(Challenge).as_scalar())
    for name, module in dynamic_challenges.registry.items():
        dyn_cnt = module.solved_count_query().filter(Challenge.module == name)
        query = query + dyn_cnt.as_scalar()
    return query.label("solved_count")

def is_activated_by_callfilter_id(session, callfilter_id):
    return (session.query(func.count(Callfiltermember.active))
            .join((Callfilter, Callfilter.id == Callfiltermember.callfilterid))
            .filter(and_(Callfiltermember.callfilterid == callfilter_id,
                         Callfiltermember.bstype == 'secretary',
                         Callfiltermember.active == 1))
            .first()[0])