#20753: Beginner confused for MultiValueDictKeyError, where the error comes
from?
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Reporter: adam.pahlevi@… | Owner: nobody
Type: Bug | Status: new
Component: contrib.admin | Version: 1.4
Severity: Normal | Keywords: MultiValueDictKeyError
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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I am new to Django and would like to try it for my thesis project.
However, I found an error which is MultiValueDictKeyError when I try to
save my model from the Django admin.
I have 3 models in this case, which are: BSN (Business), LIN (Lines), ROT
(Routes).
BSN:
{{{#!python
class Bsn(models.Model):
"""The entity of business"""
#the enum for business type
BUSINESSTYPE = (
('bank', 'Bank'),
('barclub', 'Bar-Club'),
('carrental', 'Car rental'),
('church', 'Church'),
('clinic', 'Clinic'),
('cybercafe', 'Cybercafe'),
('exchange', 'Exchange'),
('festival', 'Festival'),
('fleamarket', 'Fleamarket'),
('hotel', 'Hotel'),
('mosque', 'Mosque'),
('police', 'Police'),
('primary', 'Primary'),
('restaurant', 'Restaurant'),
('secondary', 'Secondary'),
('shop', 'Shop'),
('sight', 'Sight'),
('transportation', 'Transportation'),
('uni', 'University')
)
bsnid = models.AutoField(primary_key=True)
id = bsnid.__str__()
bsnname = models.CharField("Business name", max_length=135,
unique=True)
bsntype = models.CharField("Business type", max_length=42,
choices=BUSINESSTYPE)
bsndesc = models.CharField("Description", max_length=135, blank=True)
bsnparent = models.ForeignKey('self', null=True,
db_column='bsnparent', blank=True)
bsncoorx = models.DecimalField("Coordination X in Map", null=True,
blank=True, max_digits=11, decimal_places=0)
bsncoory = models.DecimalField("Coordination Y in Map", null=True,
blank=True, max_digits=11, decimal_places=0)
bsncoorn = models.DecimalField("Coordination N in Map", null=True,
blank=True, max_digits=11, decimal_places=0)
def __unicode__(self):
return self.bsnname
class Meta:
db_table = u'bsn'
verbose_name="Business"
verbose_name_plural="Businesses"
}}}
Class LIN
{{{#!python
class Lin(models.Model):
"""model for the line"""
linid = models.AutoField(primary_key=True)
id = str(linid)
linbsn = models.ForeignKey(Bsn, db_column='linbsnid')
def __unicode__(self):
return "Line " + self.linbsn.bsnname
class Meta:
db_table = u'lin'
verbose_name = "Line"
}}}
And, the last but not least, ROT:
{{{#!python
class Rot(models.Model):
rotid = models.IntegerField(primary_key=True)
rotlin = models.ForeignKey(Lin, null=True, db_column='rotlinid',
blank=True)
rotfrom = models.ForeignKey(Trn, null=True, db_column='rotfrom',
blank=True, related_name="rotfrom")
rotto = models.ForeignKey(Trn, null=True, db_column='rotto',
blank=True, related_name="rotto")
rotkm = models.FloatField(null=True, blank=True)
rottimemnt = models.IntegerField(null=True, blank=True)
rotprice = models.FloatField(null=True, blank=True)
rotisinterchange = models.BooleanField(default=False, null=False,
blank=False, verbose_name="is interchange?")
rotisactive = models.BooleanField(default=True, null=False,
blank=False, verbose_name="is active?")
rotdesc = models.CharField(max_length=225, blank=True)
def __unicode__(self):
if self.rotfrom is None:
return "to " + str(self.rotto)
elif self.rotto is None:
return "from " + str(self.rotfrom)
else:
return "{0} to {1}".format(self.rotfrom.bsnid.bsnname,
self.rotto.bsnid.bsnname)
class Meta:
db_table = u'rot'
verbose_name = "Route"
}}}
The model are generated from inspectdb, and all is working when I try to
save one by one manually; both from Django admin and from the Django
console, and also from a Pilot.py file that I myself created to fill the
database automatically whenever I want, with initial data.
But, when I go to admin page for LIN, that itself is a 'child' of BSN and
that itself is used to determine and show the ROT; I got the multivalued
key error. I have tried to understand this error, but I lost myself. I
have no one at hand to help except than the Django community here. So,
please let me know where I am wrong at.
Here are the Admin code.
{{{#!python
class RotAdmin(admin.ModelAdmin):
"""admin page for route"""
fieldsets = [
(None, {'fields': ['rotlin', 'rotfrom', 'rotto',
'rotisinterchange', 'rotisactive']}),
("Distance", {'fields': ['rotkm', 'rottimemnt', 'rotprice']}),
("Description", {'fields': ['rotdesc']})
]
admin.site.register(Rot, RotAdmin)
class RotGridsTabular(admin.TabularInline):
fields = ['rotfrom', 'rotto', 'rotkm', 'rottimemnt', 'rotprice',
'rotisinterchange', 'rotisactive']
model = Rot
extra = 0
class LinAdmin(admin.ModelAdmin):
"""admin page for line"""
fields = ['linbsn']
inlines = [RotGridsTabular]
admin.site.register(Lin, LinAdmin)
}}}
Note: when I add the ROT record from the ROT admin, it works; when I add
the ROT record from LIN admin, it crashes and throws the Multivalued key
error.
--
Ticket URL: <https://code.djangoproject.com/ticket/20753>
Django <https://code.djangoproject.com/>
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