I have a somewhat odd scenario. I am using a read only database that I have access through my property management software. They allow the user to define fields in there software. However they don't show up as specific fields in the database. The database has 2 tables related to them propuserdefined and propuserdefinedvalues. The propuserdefined contains all the info about the field(id, name, description) the propuserdiefinedvalues contains the values associated with the property. It has propid, userdefinedid, and value. My question is this, I need to access the value of propuserdefinedvalues where propid equals the propid in my for property in properties statement and the userdefinedid equals 49. How would I do this? Is it with a template tag?
Thanks in advance for your help.
Brandon
Here are my models.
class Propuserdefined(models.Model):
userdefinedid = models.IntegerField(primary_key=True)
name = models.CharField(max_length=50L, blank=True)
type = models.IntegerField()
userid = models.IntegerField(null=True, blank=True)
updated = models.DateTimeField(null=True, blank=True)
datecreated = models.DateTimeField(null=True, blank=True)
combolist = models.TextField(blank=True)
class Meta:
db_table = 'propuserdefined'
class Propuserdefinedvalues(models.Model):
userdefinedid = models.IntegerField()
propid = models.IntegerField()
value = models.TextField(blank=True)
userid = models.IntegerField(null=True, blank=True)
updated = models.DateTimeField(null=True, blank=True)
datecreated = models.DateTimeField(null=True, blank=True)
class Meta:
db_table = 'propuserdefinedvalues'
class Property(models.Model):
propid = models.IntegerField(primary_key=True)
name = models.CharField(max_length=35L, blank=True)
shortname = models.CharField(max_length=6L, blank=True)
street1 = models.CharField(max_length=50L, blank=True)
street2 = models.CharField(max_length=50L, blank=True)
city = models.CharField(max_length=50L, blank=True)
state = models.CharField(max_length=2L, blank=True)
zip = models.CharField(max_length=50L, blank=True)
phone = models.CharField(max_length=21L, blank=True)
fax = models.CharField(max_length=50L, blank=True)
email = models.CharField(max_length=255L, blank=True)
manager = models.CharField(max_length=25L, blank=True)
billname1 = models.CharField(max_length=35L, blank=True)
billname2 = models.CharField(max_length=35L, blank=True)
billstreet1 = models.CharField(max_length=50L, blank=True)
billstreet2 = models.CharField(max_length=50L, blank=True)
billcity = models.CharField(max_length=50L, blank=True)
billstate = models.CharField(max_length=2L, blank=True)
billzip = models.CharField(max_length=50L, blank=True)
proptaxid = models.CharField(max_length=35L, blank=True)
rentchargetype = models.CharField(max_length=20L, blank=True)
lastpostdate = models.DateField(null=True, blank=True)
lastweeklypostdate = models.DateField(null=True, blank=True)
comments = models.CharField(max_length=25L, blank=True)
enablespeciallatecharge = models.IntegerField(null=True, blank=True)
fixedlatecharge = models.IntegerField(null=True, blank=True)
fixedlateamount = models.FloatField(null=True, blank=True)
fixedlaterentonly = models.IntegerField(null=True, blank=True)
percentlate = models.IntegerField(null=True, blank=True)
percentlateamount = models.FloatField(null=True, blank=True)
percentlatefullcharge = models.IntegerField(null=True, blank=True)
percentlaterentonly = models.IntegerField(null=True, blank=True)
perdaylate = models.IntegerField(null=True, blank=True)
perdaylateamount = models.FloatField(null=True, blank=True)
perdaylategrace = models.IntegerField(null=True, blank=True)
perdaylategracenum = models.IntegerField(null=True, blank=True)
perdatelatelimitamount = models.FloatField()
perdaylategracenonretro = models.IntegerField()
perdaylategraceexclweekends = models.IntegerField()
perdaylategraceexclholidays = models.IntegerField()
datecreated = models.DateTimeField(null=True, blank=True)
updated = models.DateTimeField(null=True, blank=True)
userid = models.IntegerField(null=True, blank=True)
logofile = models.CharField(max_length=255L, blank=True)
merchantid = models.CharField(max_length=255L, blank=True)
epaybankid = models.IntegerField()
epaylimit = models.FloatField()
epayenabled = models.IntegerField()
achconveniencefeeenabled = models.IntegerField()
ccconveniencefeeenabled = models.IntegerField()
rwaachconvenciencefeeenabled = models.IntegerField()
rwaccconveniencefeeenabled = models.IntegerField()
epayislimited = models.IntegerField()
epayusedefaults = models.IntegerField()
achconveniencefee = models.FloatField(null=True, blank=True)
ccconveniencefee = models.FloatField(null=True, blank=True)
rwaachconveniencefee = models.FloatField(null=True, blank=True)
rwaccconveniencefee = models.FloatField(null=True, blank=True)
epaychargetype = models.IntegerField()
epayamounttype = models.IntegerField()
epaysetamount = models.FloatField()
epaycustlimit = models.FloatField()
sqft = models.IntegerField()
lateminbalance = models.FloatField(null=True, blank=True)
defaultbank = models.IntegerField()
postday = models.IntegerField(null=True, blank=True)
active = models.IntegerField(null=True, blank=True)
iscommercial = models.IntegerField(null=True, blank=True)
assignedissueuserid = models.IntegerField(null=True, blank=True)
altname = Propuserdefinedvalues.objects.filter(userdefinedid=49)
class Meta:
db_table = 'property'
It sounds like you are attempting to do this in a Django template. You should instead be using Python code, because Django templates are not designed for this.
The Django models for the table also won't provide the nicest interface for accessing these properties. Instead you should create some functions on top of them. Alternatively you could write raw SQL that do joins across the two tables.
Using your models as they are (there are no ForeignKeys defined, so you can't use the ORM to follow relationships), you can get the details like this (if I understood your question correctly):
property = Property.objects.get(name='my_property_name') # or however you get the property
prop_user_defined_values = Propuserdefinedvalues.objects.filter(propid=property.id, userdefinedid=49)
However, this could be shorted if you changed the order of your models, and some of your fields to type ForiegnKey:
class Property(models.Model):
# ... rest truncated ...
class Propuserdefined(models.Model):
# ... rest truncated ...
class Propuserdefinedvalues(models.Model):
property = models.ForeignKey(Property, db_column='propid')
userdefined = models.ForeignKey(Propuserdefined, db_column='userdefinedid')
# ... rest truncated ...
This would let you do something like:
Propuserdefinedvalues.objects.filter(userdefined__name='my_name', property__name='my_property')
# or:
my_property = Property.objects.get(name='my_property')
Propuserdefinedvalues.objects.filter(userdefined__userdefinedid=49, property=my_property)
I suggest you read about Django's models here: https://docs.djangoproject.com/en/1.5/topics/db/models/ - they're quite easy to get right, even if you have pre-existing tables, as long as you know the relationships.
(Disclaimer: untested code! May be bugs ;))
Related
I'm trying to list the values of FacilityAddressSerializer within the FacilitySearchSerializer. This is what i tried. I get all the values of the FacilitySearchSerializer but the values of the FacilityAddressSerializer are showing as Null:
serializers.py
class FacilityAddressSerializer(serializers.ModelSerializer):
class Meta:
model = FacilityAddress
fields = (
"id",
"PrimaryAddress",
"SecondaryAddress",
"City",
"RegionOrState",
"PostalCode",
"Geolocation",
"AddressInfo"
)
class FacilitySearchSerializer(serializers.ModelSerializer):
AddressInfo = FacilityAddressSerializer(source="fa")
class Meta:
model = Facility
fields = (
"id",
"Name",
"AddressInfo",
"ListingVerified",
"mainimage",
"AdministratorCell",
"Capacity",
"PriceRangeMin",
"PriceRangeMax",
)
read_only_fields = ("id", "Name", "ListingVerified", "mainimage", "AdministratorCell", "Capacity", "FeaturedVideo", "PriceRangeMin", "PriceRangeMax")
models.py
class Facility(models.Model):
Name = models.CharField(max_length=150, null=True, blank=False)
mainimage = models.ImageField(null=True, blank=True)
Capacity = models.IntegerField(null=True, blank=True)
TelephoneNumber = models.CharField(max_length=30, null=True, blank=True)
AdministratorCell = PhoneNumberField(null=True, blank=True)
PriceRangeMin = models.IntegerField(null=True, blank=True)
PriceRangeMax = models.IntegerField(null=True, blank=True)
class FacilityAddress(models.Model):
PrimaryAddress = models.CharField(max_length=150, null=True, blank=True)
SecondaryAddress = models.CharField(max_length=150, null=True, blank=True)
City = models.CharField(max_length=150, null=True, blank=True)
RegionOrState = models.CharField(max_length=50, null=True, blank=True)
PostalCode = models.CharField(max_length=30, null=True, blank=True)
Geolocation = models.CharField(max_length=30, null=True, blank=True)
AddressInfo = models.ForeignKey(Facility, null=True, blank=True, on_delete=models.CASCADE, related_name='fa')
It works after i added (many=True) next to the source=fa. I thought i didn't need that since i'm using foreign key fields and not manytomany fields but i guess i was wrong.
Sorry for the wording on the question if it isn't clear.
I am rather new to Django but not too new to Python. I have a Model in my Django Project, which keeps track of trailer locations. I then need to use another script to update this data. However, when running this script, the Dict that is suppose to be returned is not getting returned properly.
class TrailerLocation(models.Model):
trailer = models.OneToOneField(Trailer, on_delete=models.CASCADE)
locationCity = models.CharField(max_length=70, null=True, blank=True)
locationState = models.CharField(max_length=30, null=True, blank=True)
locationCountry = models.CharField(max_length=50, null=True, blank=True)
locationStatus = models.CharField(max_length=200, null=True, blank=True)
latitude = models.CharField(max_length=200, null=True, blank=True)
longitude = models.CharField(max_length=200, null=True, blank=True)
id = models.UUIDField(default=uuid.uuid4, unique=True, primary_key=True, editable=False)
# def __str__(self):
# return self.trailer
def createLocation(self, trailer):
trailerLocation = TrailerLocation(trailer=trailer)
trailerLocation.save()
def getLocations(self):
locDataDict = trailerLocations.run()
print(locDataDict)
for key in locDataDict.keys():
datalist = locDataDict[key]
self.updateLocation(key, datalist)
I have two models in django with definitions below.
CreativeStatus model :
class RtbdCreativeStatus(models.Model):
creative_id = models.CharField(max_length=500, primary_key=True)
advertiser_id = models.CharField(max_length=100, primary_key=True)
exposure_level = models.CharField(max_length=125)
modified_on = models.DateTimeField()
modified_by = models.CharField(max_length=100)
class RtbdCreative(models.Model):
id = models.AutoField(primary_key=True)
advertiser_id = models.ForeignKey(RtbdCreativeStatus, on_delete=models.CASCADE)
creative_id = models.ForeignKey(RtbdCreativeStatus, on_delete=models.CASCADE)
country_id = models.IntegerField()
adm = models.CharField(max_length=255, null=True, blank=True)
sample_url = models.CharField(max_length=500)
landing_page = models.CharField(max_length=500, null=True, blank=True)
html = models.CharField(max_length=500)
creative_attributes = models.CommaSeparatedIntegerField(max_length=150, null=True, blank=True)
advertiser_domains = models.CharField(max_length=500)
description = models.CharField(max_length=500, null=True, blank=True)
created_on = models.DateTimeField(auto_now=True, auto_now_add=True)
creative_type = models.CharField(max_length=50, null=True, blank=True)
demand_source_type_id = models.IntegerField()
revalidate = models.BooleanField(default=False)
(creative_id, advertiser_id ) combination is unique in my CreativeStatus table . I want that combination to be my foreign key for Creative table. I tried adding it but i get this error .
1)How do i achieve this join with two key combination as my foreign key .
2)What should be my query to fetch all the creatives with their status from CreativeStatus table .
UPDATE 1
on reading the answers below , i updated my model as mentioned below :
class RtbdCreative(models.Model):
id = models.AutoField(primary_key=True)
advertiser_id = models.ForeignKey(RtbdCreativeStatus, to_field='advertiser_id', related_name='advertiser', db_column='advertiser_id', on_delete=models.CASCADE)
creative_id = models.ForeignKey(RtbdCreativeStatus, to_field='creative_id', related_name='creative', db_column='creative_id', on_delete=models.CASCADE)
country_id = models.IntegerField()
adm = models.CharField(max_length=255, null=True, blank=True)
sample_url = models.CharField(max_length=500)
landing_page = models.CharField(max_length=500, null=True, blank=True)
html = models.CharField(max_length=500)
creative_attributes = models.CommaSeparatedIntegerField(max_length=150, null=True, blank=True)
advertiser_domains = models.CharField(max_length=500)
description = models.CharField(max_length=500, null=True, blank=True)
created_on = models.DateTimeField(auto_now=True, auto_now_add=True)
creative_type = models.CharField(max_length=50, null=True, blank=True)
demand_source_type_id = models.IntegerField()
revalidate = models.BooleanField(default=False)
Now i am getting this error . I have combination of advertiser_id , craetive_id as unique . But django expects both to be unique. What can i do to make it work ?
As mentioned in ERRROS, you need to add related_name as argument, when you want to add more than one foreign key for same Model.
class Creative(models.Model):
id = models.AutoField(primary_key=True)
advertiser_id = models.ForeignKey(RtbdCreativeStatus,
related_name="Advertiser", on_delete=models.CASCADE)
creative_id = models.ForeignKey(RtbdCreativeStatus,
related_name="Creative",
on_delete=models.CASCADE)
country_id = models.IntegerField()
adm = models.CharField(max_length=255, null=True, blank=True)
sample_url = models.CharField(max_length=500)
landing_page = models.CharField(max_length=500, null=True, blank=True)
html = models.CharField(max_length=500)
creative_attributes = models.CommaSeparatedIntegerField(
max_length=150, null=True, blank=True)
advertiser_domains = models.CharField(max_length=500)
description = models.CharField(max_length=500, null=True, blank=True)
created_on = models.DateTimeField(auto_now=True, auto_now_add=True)
creative_type = models.CharField(max_length=50, null=True, blank=True)
demand_source_type_id = models.IntegerField()
revalidate = models.BooleanField(default=False)
I just saw a parameter as to_fields for models.ForeignObject, superclass of models.ForeignKey. It might be used in this case for defining foreign key for composite primary key or unique keys.
advertiser_creative_id = models.ForeignObject(RtbdCreativeStatus, to_fields=['advertiser_id', 'creative_id'], related_name='abc', on_delete=models.CASCADE)
There is a from_fields parameter as well. It can be used to map the fields with to_fields.
Refer https://docs.djangoproject.com/en/2.2/_modules/django/db/models/fields/related/
When you add multiple ForeignKeys towards same table, you should override the related_name option of your fields, so that the fields could be distinguished easily.
You could implement a custom validation for checking uniqueness of the creative_id and advertiser_id,
class Creative(models.Model):
advertiser_id = models.ForeignKey(CreativeStatus,
related_name="advertisers")
creative_id = models.ForeignKey(CreativeStatus,
related_name="creatives")
def clean(self):
data = self.cleaned_data
if not data['advertiser_id'] == data['creative_id']:
raise ValidationError("Unique Constraint failed {}, {}".format(self.advertiser_id, self.creative_id))
return data
You could query your creatives from CreativeStatus using the related name.
creative_status_obj = CreativeStatus.objects.get(pk=some_pk)#or any query.
#All creatives of the given object can be queried using reverse relation.
creatives = creative_status_obj.creatives.all()
I have a form where I can create and edit a group (a business really). Though I want to be able to say this business has many locations. I have the models written but the UI is giving me trouble.
I think mostly my question would be answered by how to update the Group model (creating/editing a group) and the GroupLocations model with a single form (adding an address as a new location if need be) so almost three models with a single form?
The models are:
class Address(models.Model):
city = models.CharField(max_length=50)
state = models.CharField(max_length=50)
zip_code = models.CharField(max_length=50)
address_line_one = models.CharField(max_length=50)
address_line_two = models.CharField(max_length=50, null=True, blank=True)
contact = models.CharField(max_length=50, null=True, blank=True)
phone = models.CharField(max_length=50)
fax = models.CharField(max_length=50, null=True, blank=True)
created_at=models.DateField(auto_now_add=True)
updated_at=models.DateField(auto_now=True)
def __str__(self):
return self.city
class Group(models.Model):
group_name = models.CharField(max_length=50)
group_contact= models.CharField(max_length=50)
tin = models.CharField(max_length=50)
npi =models.CharField(max_length=50)
notes = models.TextField(max_length = 255, null=True, blank=True)
billing_address = models.ForeignKey('Address', related_name = 'billing_address', on_delete=models.SET_NULL, null=True)
mailing_address = models.ForeignKey('Address', related_name = 'mailing_address', on_delete=models.SET_NULL, null=True, blank=True)
start_date = models.DateField(auto_now=False, auto_now_add=False, null=True, blank=True)
end_date = models.DateField(auto_now=False, auto_now_add=False, null=True, blank=True)
change_date = models.DateField(auto_now=False, auto_now_add=False, null=True, blank=True)
change_text = models.TextField(max_length = 255, null=True, blank=True)
term_comment = models.TextField(max_length = 255, null=True, blank=True)
group_phone=models.CharField(max_length=50)
group_fax = models.CharField(max_length=50)
group_term = models.ForeignKey(GroupTerm, on_delete=models.SET_NULL, null=True, blank=True) #quesiton is can a group be termed many times?
created_at=models.DateField(auto_now_add=True)
updated_at=models.DateField(auto_now=True)
#provider_location = models.ManyToManyField('ProviderLocations', through='GroupLocations')
def __str__(self):
return self.group_name
class GroupLocations(models.Model):
address = models.ForeignKey('Address', on_delete= models.SET_NULL, null=True)
group = models.ForeignKey('Group', on_delete=models.CASCADE)
doing_business_as = models.CharField(max_length = 255)
created_at=models.DateField(auto_now_add=True)
updated_at=models.DateField(auto_now=True)
def __str__(self):
return self.doing_business_as
I would love to (for this model and others) mimic how the admin handles users with the nice left and right multiple select boxes: (Though not sure how the add new location maybe a button to take you to another form that somehow knows its supposed to be added to the group as well?)
I realize this is a very large question I am looking for just mostly I think how to deal with several models on one form/template rails had a word for this (the name escapes me now) and not sure what the Django paradigm is.
Hi I am recreating a website in django and this happens...
Django throw this error,
ValueError: save() prohibited to prevent data loss due to unsaved related object 'fk_deal'.
even though I have saved the foreign key related object. This is the view part.
if request.method == "POST":
deal = DEAL()
name = request.POST.get('name')
revenue_2013 = request.POST.get('revenue_2013')
if project_name:
print project_name
deal.name = project_name
deal.save()
print deal.id # prints None
# financials 2013
if revenue_2013:
fin = DEALFINANCIALINFORMATION.objects.create(
financial_category_amount=revenue_2013,
financial_year='2013',
fk_deal = deal,
financial_category_id=1,
)
These are the models....
class DEAL(models.Model):
id = models.BigIntegerField(db_column='ID', primary_key=True) # Field name made lowercase.
company_name = models.CharField(max_length=33L, db_column=u'COMPANY_NAME', blank=True)
investmentrequired = models.FloatField(null=True, blank=True)
is_deleted = MySQLBooleanField(db_column=u'IS_DELETED', blank=True, default=None)
name = models.CharField(max_length=33L, db_column=u'NAME', blank=True)
photo = models.CharField(max_length=66L, db_column=u'PHOTO', blank=True)
status = models.CharField(max_length=85L, db_column=u'STATUS', blank=True)
timestamp = models.DateTimeField(null=True, db_column=u'TIMESTAMP', blank=True)
teaser = models.TextField(db_column=u'TEASER', blank=True)
currency_id = models.BigIntegerField(null=True, db_column=u'CURRENCY_ID', blank=True)
description = models.TextField(db_column=u'DESCRIPTION', blank=True)
country = models.ForeignKey('COUNTRIES', null=True, db_column=u'COUNTRY_ID', blank=True)
sector = models.ForeignKey('SECTORS', null=True, db_column=u'SECTOR_ID', blank=True)
type = models.ForeignKey('TYPES', null=True, db_column=u'TYPE_ID', blank=True)
username = models.CharField(max_length=85L, db_column=u'USERNAME', blank=True)
user = models.ForeignKey('USER', null=True, db_column=u'USER_ID', blank=True)
hitcounter = models.BigIntegerField(null=True, db_column=u'HITCOUNTER', blank=True)
approx_usd = models.DecimalField(decimal_places=2, null=True, max_digits=19, db_column=u'approxUSD', blank=True)
userdeal_id = models.BigIntegerField(null=True, db_column=u'USERDEAL_ID', blank=True)
is_featuredeal = MySQLBooleanField(db_column=u'IS_FEATUREDEAL', blank=True, default=None)
basic_company_email = models.CharField(max_length=33L, db_column=u'BASIC_COMPANY_EMAIL', blank=True)
basic_company_name = models.CharField(max_length=33L, db_column=u'BASIC_COMPANY_NAME', blank=True)
basic_company_phone = models.CharField(max_length=33L, db_column=u'BASIC_COMPANY_PHONE', blank=True)
basic_company_website = models.CharField(max_length=33L, db_column=u'BASIC_COMPANY_WEBSITE', blank=True)
basic_elevator_pitch = models.TextField(db_column=u'BASIC_ELEVATOR_PITCH', blank=True)
basic_premoney_evaluation = models.DecimalField(decimal_places=2, null=True, max_digits=19, db_column=u'BASIC_PREMONEY_EVALUATION', blank=True)
basic_question_1 = models.TextField(db_column=u'BASIC_QUESTION_1', blank=True)
basic_question_2 = models.TextField(db_column=u'BASIC_QUESTION_2', blank=True)
basic_question_3 = models.TextField(db_column=u'BASIC_QUESTION_3', blank=True)
basic_summary = models.TextField(db_column=u'BASIC_SUMMARY', blank=True)
basic_total_offering_amount = models.DecimalField(decimal_places=2, null=True, max_digits=19, db_column=u'BASIC_TOTAL_OFFERING_AMOUNT', blank=True)
is_company = MySQLBooleanField(db_column=u'IS_COMPANY', blank=True, default=None)
is_posted = MySQLBooleanField(db_column=u'IS_POSTED', blank=True, default=None)
is_visible = MySQLBooleanField(db_column=u'IS_VISIBLE', blank=True, default=None)
other_company_milestones = models.TextField(db_column=u'OTHER_COMPANY_MILESTONES', blank=True)
projectname = models.CharField(max_length=33L, db_column=u'PROJECTNAME', blank=True)
basicdealstage = models.ForeignKey('DEALSTAGES', null=True, db_column=u'BASICDEALSTAGE_ID', blank=True)
basic_security_type = models.ForeignKey('SECURITYTYPES', null=True, db_column=u'BasicSecurityType_ID', blank=True)
is_public = MySQLBooleanField(db_column=u'IS_PUBLIC', blank=True, default=None)
profile_completed = models.BigIntegerField(null=True, db_column=u'PROFILE_COMPLETED', blank=True)
is_closed = MySQLBooleanField(db_column=u'IS_CLOSED', blank=True, default=None)
first_step_completed = models.BigIntegerField(null=True, db_column=u'FIRST_STEP_COMPLETED', blank=True, default=0L)
second_step_completed = models.BigIntegerField(null=True, db_column=u'SECOND_STEP_COMPLETED', blank=True)
third_step_completed = models.BigIntegerField(null=True, db_column=u'THIRD_STEP_COMPLETED', blank=True)
class Meta:
db_table = u'DEAL'
def __unicode__(self):
if self.name:
return self.name
else:
return "No name"
class DEALFINANCIALINFORMATION(models.Model):
id = models.BigIntegerField(db_column='ID', primary_key=True) # Field name made lowercase.
financial_category_amount = models.DecimalField(decimal_places=2, null=True, max_digits=19, db_column=u'FINANCIAL_CATEGORY_AMOUNT', blank=True)
financial_year = models.CharField(max_length=33L, db_column=u'FINANCIAL_YEAR', blank=True)
de_al_id = models.BigIntegerField(null=True, db_column=u'DEAl_ID', blank=True)
financial_category_id = models.BigIntegerField(null=True, db_column=u'FINANCIAL_CATEGORY_ID', blank=True)
fk_deal = models.ForeignKey('DEAL', null=True, blank=True)
class Meta:
db_table = u'DEAL_FINANCIAL_INFORMATION'
The database was created from an existing MySQL database....
I send the data to the view using jquery POST....
I can't seem to find out what the problem is. Also even after saving the model if I print the id field it returns None instead....
Can somebody help me?