python - how to do a query with multi-table related sqlalchemy -


i have next models.

class provider(base):     __tablename__ = "providers"      providerid = column(integer, primary_key=true)     thirdpartyid = column(integer, foreignkey("thirdparties.thirdpartyid"))     thirdparty = relationship("thirdparty")   class thirdparty(base):     __tablename__ = 'thirdparties'      thirdpartyid = column(integer, primary_key=true, nullable=false)     economicactivityid = column(integer, foreignkey('economicactivities.economicactivityid'))  class economicactivity(base):     __tablename__ = 'economicactivities'      economicactivityid = column(integer, primary_key=true, nullable=false)     puc = relationship(u'puc',                        secondary=economicactivitypuc,                        primaryjoin=economicactivityid == economicactivitypuc.c.economicactivityid,                        secondaryjoin=puc.pucid == economicactivitypuc.c.pucid,                        lazy="dynamic")      economicactivitypuc = table(         'economicactivitypuc', base.metadata,          column('economicactivityid', foreignkey(u'economicactivities.economicactivityid'), primary_key=true, nullable=false),         column('pucid', foreignkey(u'puc.pucid'), primary_key=true, nullable=false, index=true))  class puc(base):     __tablename__ = "puc"      pucid = column(integer, primary_key=true, nullable=false)

this query:

list_provider = [provider.export_data_simple_search(provider)                          provider                          in session.query(provider.providerid, provider.branch, provider.name, provider.ismain,                                           provider.companyid, thirdparty.iswithholdingcree, thirdparty.thirdpartyid,                                           thirdparty.tradename, thirdparty.lastname,                                           thirdparty.maidenname, thirdparty.firstname,                                           thirdparty.identificationnumber, economicactivity,)                                    # .options(defer(provider.cityid))                                    .join(thirdparty, thirdparty.thirdpartyid == provider.thirdpartyid)                                    .join(economicactivity, thirdparty.economicactivityid == economicactivity.economicactivityid)                                    .filter(and_(                                         provider.companyid == company_id,                                         or_(                                             true if search == "" else none,                                             # or_(*[provider.name.like('%{0}%'.format(s)) s in words])                                             or_(*[func.concat(thirdparty.tradename +                                                    thirdparty.lastname +                                                    thirdparty.maidenname +                                                    thirdparty.firstname +                                                    thirdparty.identificationnumber +                                                    provider.name).like('%{0}%'.format(s)) s in words]                                         ))))                                    .limit(page_size)                                    .offset((int(page_number) - 1) * int(page_size))]          total_count = session.query(provider).filter(and_(                                         provider.companyid == company_id,                                         or_(                                             true if search == "" else none,                                             # or_(*[provider.name.like('%{0}%'.format(s)) s in words])                                             or_(*[func.concat(thirdparty.tradename +                                                    thirdparty.lastname +                                                    thirdparty.maidenname +                                                    thirdparty.firstname +                                                    thirdparty.identificationnumber +                                                    provider.name).like('%{0}%'.format(s)) s in words]                                         )))).count()         total_pages = int(ceil(total_count / float(page_size)))         response = jsonify({             'listthirdparty': list_provider,             'totalcount': total_count,             'totalpages': total_pages         })         return response

and export_data method next:

class provider(base):     ##### models, anothers methods, etc      @staticmethod     def export_data_simple_search(data):         pucs = none if data.economicactivity none \             else data.economicactivity.puc.filter(puc.companyid == data.companyid).first()         return {             "providerid": data.providerid,             "branch": data.branch,             "puc": none if pucs none             else {                 "pucid": pucs.pucid,                 "companyid": pucs.companyid,                 "account": '{0}{1}{2}{3}{4} {5}'.format(pucs.pucclass,                                                         pucs.pucsubclass,                                                         pucs.account,                                                         pucs.subaccount,                                                         pucs.auxiliary1,                                                         pucs.name),                 "percentage": pucs.percentage,                 "name": pucs.name,                   },             "thirdpartyid": data.thirdpartyid         }

i need query bring me data from: provider > thirdparty > economicactivity >m2m (filter companyid)> puc

this implementation works, takes around 25secs page, need skip step:

data.economicactivity.puc.filter(puc.companyid == data.companyid).first()

because it's doing 15(page size) new selects.


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