django - how to use contains or startwith in join query -

-

i want use contains in join query gives error.

following models.py:

 class profile(models.model):      name = models.charfield(max_length=50, primary_key=true)      assign = models.charfield(max_length=50)      doj = models.datefield()      dob = models.datefield()       class meta:         db_table = u'profile'       def __str__(self):          return  '%s %s %s %s' % ( self.name,self.assign,self.doj,self.dob)       def __unicode__(self):          return  u'%s %s %s %s' % ( self.name,self.assign,self.doj,self.dob)       enter code here  class working(models.model):    w_name =models.foreignkey(profile, db_column='w_name')    monday =  models.integerfield(null=true, db_column='monday', blank=true)    tuesday =  models.integerfield(null=true, db_column='tuesday', blank=true)    wednesday =  models.integerfield(null=true, db_column='wednesday', blank=true)     class meta:         db_table = u'working'     def __str__(self):          return  '%s %s %s %s' % ( self.w_name,self.monday,self.tuesday,self.wednesday)     def __unicode__(self):          return  u'%s %s %s %s' % ( self.w_name,self.monday,self.tuesday,self.wednesday)

i want use this:

m = working.objects.filter(w_name__name__contains='sushanth')  or   m = working.objects.filter(w_name__name__startswith='sushanth')

the error keep getting:

     file "<console>", line 1, in <module>   file "/usr/local/lib/python2.6/dist-packages/django-1.2.4-py2.6.egg/django/db/models/manager.py", line 141, in filter     return self.get_query_set().filter(*args, **kwargs)   file "/usr/local/lib/python2.6/dist-packages/django-1.2.4-py2.6.egg/django/db/models/query.py", line 556, in filter     return self._filter_or_exclude(false, *args, **kwargs)   file "/usr/local/lib/python2.6/dist-packages/django-1.2.4-py2.6.egg/django/db/models/query.py", line 574, in _filter_or_exclude     clone.query.add_q(q(*args, **kwargs))   file "/usr/local/lib/python2.6/dist-packages/django-1.2.4-py2.6.egg/django/db/models/sql/query.py", line 1152, in add_q     can_reuse=used_aliases)   file "/usr/local/lib/python2.6/dist-packages/django-1.2.4-py2.6.egg/django/db/models/sql/query.py", line 1092, in add_filter     connector)   file "/usr/local/lib/python2.6/dist-packages/django-1.2.4-py2.6.egg/django/db/models/sql/where.py", line 67, in add     value = obj.prepare(lookup_type, value)   file "/usr/local/lib/python2.6/dist-packages/django-1.2.4-py2.6.egg/django/db/models/sql/where.py", line 316, in prepare     return self.field.get_prep_lookup(lookup_type, value)   file "/usr/local/lib/python2.6/dist-packages/django-1.2.4-py2.6.egg/django/db/models/fields/related.py", line 139, in get_prep_lookup     raise typeerror("related field has invalid lookup: %s" % lookup_type) typeerror: related field has invalid lookup: startswith

any suggestions??

is there reason why name field primary key?

if there isn't suggest recreating tables name field not primary key. might throwing filter logic out.


Comments

Post a Comment

Popular posts from this blog

linux - Mailx and Gmail nss config dir -

-
i trying send mail linux command line using mailx command. can send local domain no problem want set mail send gmail account receive mail sent gmail account. after configuring mail.rc so: account gmail { set smtp=smtps://smtp.gmail.com:587 set smtp-auth=login set smtp-auth-user=username@gmail.com set smtp-auth-password=password set ssl-verify=ignore } i error: resolving host smtp.gmail.com . . . done. connecting 74.125.25.109 . . . connected. missing "nss-config-dir" variable. "/home/username/dead.letter" 11/354 . . . message not sent. after looking "nss-config-dir" here , located certn.db , keyn.db files , added mail.rc so: account gmail { set smtp=smtps://smtp.gmail.com:587 set smtp-auth=login set smtp-auth-user=username@gmail.com set smtp-auth-password=password set ssl-verify=ignore set nss-config-dir=/home/user/.mozilla/firefox/location.default } now when try send mail using command: echo "sent gmail account" | mailx -v -a
Read more

c# - Is it possible to remove an existing registration from Autofac container builder? -

-
something along lines: builder.registertype<mytype>().as<itype>(); builder.registertype<mytype2>().as<itype>(); builder.deregistertype<mytype>().as<itype>() var container = builder.build(); var types = container.resolve<ienumerable<itype>>(); assert.istrue(types.count == 1); assert.istrue(types[0].gettype == typeof(mytype2)); scenario: go through bunch of assemblies , go register types want make sure have 1 implementation of given type. need before create container. track on own nice if autofac me bit. this cannot done directly using containerbuilder , unless start on new one. mind you, having first built container should able construct new container filtering away unwanted types , reusing registrations first container. this: ... var container = builder.build(); builder = new containerbuilder(); var components = container.componentregistry.registrations .where(cr => cr.activator.limittype != typ
Read more

php - Mysql PK and FK char(36) vs int(10) -

-
i have read mysql can handle indexes , searches better if tables keys integers rather char(36) uuid's. is worth converting int(10)? note: use 1 server , have have plans use multiple databases concurrently therefore removing 1 of big reasons using uuid. our tables innodb if makes difference. thanks in advance. usually rdbms can handle integer keys pk more efficient, other datatypes. reason how build index column, yes: long dont require string (or other typed) keys, should use integers. however: char(36) , int(10) far away being equal, because int(10) much smaller, char(36). dont know, if require many different keys, should keep in mind. update, complete last paragraph: int(10) 32-bit, char(36) 36 - ^byte^ (= 288-bit). not mean, int consumes less space, means, char(36) has 4 times more different keys.
Read more