Question

我知道这是第一次在论坛上提出这个问题，但是我需要你的帮助，因为我无法弄清楚我做错了什么。

模型

db = DAL('sqlite://storage.sqlite',pool_size=1,check_reserved=['all'])
auth = Auth(db)
service = Service()
plugins = PluginManager()
auth.define_tables(migrate=False)
auth.define_tables(username=False, signature=False)

db.define_table('nsksystem',
            Field('email_id', db.auth_user,length=512, label = 'Email ID'),
            Field('nskname', length=128, default='', label = 'Machine Name'),
            Field('nskpassword', 'password', length=512,readable=False, label='Machine Password'),
            Field('confirmnskpassword', 'password', length=512,readable=False, label='Confirm Machine Password'),
            Field('nreleaseid',length=128, default='',label = 'Release'),
            Field('isCordinator','boolean',default='', label = 'Is Co-ordinator'))

db.nsksystem.email_id.requires = IS_NOT_EMPTY(error_message=auth.messages.is_empty)
db.nsksystem.email_id.requires = IS_IN_DB(db,'auth_user.email','%(email)s')
db.nsksystem.nreleaseid.requires = IS_NOT_EMPTY(error_message=auth.messages.is_empty)
db.nsksystem.nskname.requires = IS_NOT_EMPTY(error_message=auth.messages.is_empty)
db.nsksystem.confirmnskpassword.requires = IS_EXPR('value==%s' % repr(request.vars.get('nskpassword', None)),error_message='Passwords do not match')
db.nsksystem.isCordinator.requires=IS_NOT_IN_DB(db(db.nsksystem.nreleaseid == request.vars.nreleaseid), 'nsksystem.isCordinator', error_message='Co-ordinator Already exist for specified release')

控制器

def uregistration():
    form=SQLFORM(db.auth_user)
        if form.process().accepted:
            response.flash = 'User is registered. Redirecting to machine registration'
            redirect(URL('mregistration'))
        elif form.errors:
            response.flash = 'Form has errors'
        else:
            response.flash = 'Please fill out the form'
        return dict(form=form)
def mregistration():
        form=SQLFORM(db.nsksystem)
            if form.process().accepted:
                response.flash = 'Machine is registered to user. Please go to Login page.'
                redirect(URL('index'))
            elif form.errors:
                response.flash = 'Form has errors'
            else:
                response.flash = 'Please fill out the form'
                return dict(form=form)

在我成功注册后，我被引导到机器注册URL。我不得不从下拉列表中选择电子邮件ID。我在注册时提供的这封电子邮件ID。我提交后，我收到此错误。

回溯

  Traceback (most recent call last):
  File "gluon/restricted.py", line 224, in restricted
  File "C:/web2py/applications/click/controllers/default.py", line 63, in <module>
  File "gluon/globals.py", line 393, in <lambda>
  File "C:/web2py/applications/click/controllers/default.py", line 30, in mregistration
    if form.process().accepted:
  File "gluon/html.py", line 2303, in process
  File "gluon/html.py", line 2240, in validate
  File "gluon/sqlhtml.py", line 1677, in accepts
  File "gluon/dal/objects.py", line 724, in insert
  File "gluon/dal/adapters/base.py", line 715, in insert
IntegrityError: foreign key constraint failed

Error snapshot
  <class 'sqlite3.IntegrityError'>(foreign key constraint failed)

 Function argument list


  (self=<gluon.dal.adapters.sqlite.SQLiteAdapter object>, 
  table=<Table nsksystem   (id,email_id,nskname,nskpassword,confirmnskpassword,nreleaseid,isCordinator)>,
   fields=[(<gluon.dal.objects.Field object>, '1234'), 
  (<gluon.dal.objects.Field object>, 'yennae.ind.codefactory.com'), 
  (<gluon.dal.objects.Field object>, 0), 
  (<gluon.dal.objects.Field object>, True), 
  (<gluon.dal.objects.Field object>, 'AAA'), 
  (<gluon.dal.objects.Field object>, '1234')])

此外，我没有看到我的电子邮件ID显示在故障单中显示的功能参数列表中。由于这是一项要求，我无法关闭约束。

接下来即使我刷新db.auth_user，也会自动添加10条记录。我怎么能阻止这一点。

Answer 1

db.nsksystem.email_id被定义为对db.auth_user表的引用，这意味着它必须存储来自db.auth_user的记录ID（这是一个整数），而不是电子邮件地址。因此，您定义的验证器不正确：

db.nsksystem.email_id.requires = IS_IN_DB(db, 'auth_user.email', '%(email)s')

应该是：

db.nsksystem.email_id.requires = IS_IN_DB(db, 'auth_user.id', '%(email)s')

实际上，没有理由明确定义该验证器，因为它是引用字段的默认验证器。（注意，HTML select小部件将显示电子邮件地址列表，但提交和存储的实际值将是与电子邮件地址关联的auth_user记录ID。）

其他一些问题：

不要两次调用auth.define_tables()（不要用migrate=False调用它，除非已经根据需要定义了表格。）

不要将字段的requires属性设置两次，因为第二个属性只会覆盖第一个字段。此外，如果还有IS_NOT_EMPTY验证器，则无需设置IS_IN_DB验证器，因为后者不允许空值。

web2py：sqlite3.IntegrityError＆＃39;＆gt;（外键约束失败）

1 个答案: