I am using mongoengine with flask. I have a db.Document class called profile in which i want a field to be nullable and unique, i understand the way to do this is to make an index of that field that is both sparse=True and unique=True, how do i go about doing this?
You will have to declare the index in the meta definition eg:
class BlogPost(Document):
date = DateTimeField(db_field='addDate', default=datetime.now)
category = StringField()
tags = ListField(StringField())
meta = {
'indexes': [
{'fields': ['-date'], 'unique': True,
'sparse': True, 'types': False },
],
}
In case of unique constraint you can set it with the field declaration as:
email = mongodb.EmailField(required=True, unique=True)
We can directly mention it in the Field parameters. Example:
email = db.EmailField(sparse=True, unique=True, required=False)
Related
I've read the docs and searched this site but cannot seem to find a solution to sorting field values by the order in which they are declared. The docs state that adding ordered = True to the class Meta will solve this problem -
class MySchema(Schema):
class Meta:
ordered = True
However, I am not using class Meta in my schema. My schema simply looks like -
class MySchema(Schema):
id = fields.Integer()
name = fields.Str()
category = fields.Str()
So in this situation, how and where would I set ordered = True? Thanks!
I solved the issue by changing my schema class to -
class MySchema(Schema):
class Meta:
ordered = True
id = fields.Integer()
name = fields.Str()
category = fields.Str()
and then also adding JSON_SORT_KEYS=False to my app's config.py file.
I know that this inconvenient is very presented, may be that I need learn more about of serializer relationships
I have the following model:
class Field(models.Model):
FIELD_TYPE_NATURE = 'Grama natural'
FIELD_TYPE_ARTIFICIAL = 'Grama sintetica'
FIELD_TYPE_CHOICES = (
(FIELD_TYPE_NATURE, u'Grama natural'),
(FIELD_TYPE_ARTIFICIAL, u'Grama sintetica'),
)
MODALITY_11 = 'Fútbol 11'
MODALITY_8 = 'Fútbol 8'
MODALITY_CHOICES = (
(MODALITY_11, u'Fútbol 11'),
(MODALITY_8, u'Fútbol 8'),
)
name = models.CharField(
max_length=150,
unique=True,
db_index=True,
primary_key=True,
)
field_type = models.CharField(
choices=FIELD_TYPE_CHOICES,
default=False,
blank=False,
max_length=20,
verbose_name=('Tipo de material/grama de la cancha')
)
modality = models.CharField(
max_length=40,
blank=False,
verbose_name='Modalidad'
)
photo = models.ImageField(upload_to='fields', blank=True, null=True)
location = models.CharField(max_length=150, blank=False)
def __str__(self):
return '%s %s %s' % (self.name, self.field_type, self.location)
My serializer is the following:
class FieldSerializer(serializers.HyperlinkedModelSerializer):
#url = serializers.HyperlinkedIdentityField(view_name='field-detail',)
class Meta:
model = Field
fields = ('url', 'name','field_type','modality','photo','location')
My viewset is:
class FieldViewSet(viewsets.ModelViewSet):
queryset = Field.objects.all()
serializer_class = FieldSerializer
This is my router:
router = routers.DefaultRouter()
router.register(r'fields', FieldViewSet)
And my url:
...
url(r'^api/', include(router.urls)),
...
When I go to the http://localhost:8000/api/fields/ url I get the following message:
File "/home/bgarcial/.virtualenvs/fuupbol2/lib/python3.5/site-packages/rest_framework/relations.py", line 386, in to_representation
raise ImproperlyConfigured(msg % self.view_name)
django.core.exceptions.ImproperlyConfigured: Could not resolve URL for **hyperlinked relationship using view name "field-detail". You may have failed to include the related model in your API, or incorrectly configured the `lookup_field` attribute on this field.**
[11/Nov/2016 16:39:53] "GET /api/fields/ HTTP/1.1" 500 187477
When I use HyperlinkedIdentityField in my FieldSerializer class:
class FieldSerializer(serializers.HyperlinkedModelSerializer):
url = serializers.HyperlinkedIdentityField(view_name='field-detail',)
class Meta:
model = Field
fields = ('url', 'name','field_type','modality','photo','location')
I follow getting the same error.
Althought when I go to the url http://localhost:8000/api/fields/ I want get is a list of my objects, then is possible that I should put:
url = serializers.HyperlinkedIdentityField(view_name='field-list',)
?
I use HyperlinkedIdentityField according to:
This field can be applied as an identity relationship, such as the
'url' field on a HyperlinkedModelSerializer. It can also be used for
an attribute on the object.
I put the field-list in my view_name attribute and I get the error related
Could not resolve URL for hyperlinked relationship using view name "field-list". You may have failed to include the related model in your API, or incorrectly configured the `lookup_field` attribute on this field.
I don't understand the situations when I should use view_name attribute in relation to if I wnt get a list objects, a object detail and so ... although here explain something about it.
When I should use HyperlinkedModelSerializer and ModelSerializer
I've the following model, and the extend to the product_template
class Version(models.Model):
_name='product_cars_application.version'
name = fields.Char()
model_id = fields.Many2one('product_cars_application.model',string="Model")
brand_id = fields.Char(related='model_id.brand_id.name',store=True,readonly=1)
year_id = fields.Char(related='model_id.year_id.name',store=True,readonly=1)
from openerp.osv import osv,fields as Fields
class product_template(osv.osv):
_name = 'product.template'
_inherit = _name
_columns = {
'versions_ids':Fields.many2many('product_cars_application.version',string='Versions')
}
And the following controller which I need to filter products by version_id
#http.route('/pa/get_products/<version_id>', auth='none', type='json',website=True)
def get_products(self,version_id,**kwargs):
#TODO APPEND SECURITY
version_id = int(version_id)
products = http.request.env['product.template'].sudo().search([(version_id,'in','versions_ids')])
I get none products in return while the version_id is in versions_ids.
Do anyone knows what I'm doing wrong?
I need to make the value of comparison of the field a list, maybe becouse the field versions_ids is a many2many
I have solved like this:
#http.route('/pa/get_products/<version_id>', auth='none', type='json',website=True)
def get_products(self,version_id,**kwargs):
#TODO APPEND SECURITY
products = http.request.env['product.template'].sudo().search([('versions_ids','in',[version_id])])
list = []
for p in products:
list.append([p.id, p.name])
return {
'products':list,
}
"return products.ids" is missing inside get_products like:
#http.route('/pa/get_products/<version_id>', auth='none', type='json',website=True)
def get_products(self,version_id,**kwargs):
#TODO APPEND SECURITY
version_id = int(version_id)
products = http.request.env['product.template'].sudo().search([(version_id,'in','versions_ids')])
return products.ids
I am using Web2py and I would like to add extra fields in the auth_user. some of these fields are reference to other table. for example:
auth.settings.extra_fields['auth_user']= [
Field('country', 'reference countries')]
db.define_table(
'countries',
Field('name'),
format = '%(name)s'
)
but I receive this issue:
cannot resolve reference countries in auth_user definition
can any one help me what should I do? how can I link auth_user table with another table???
All the Best
you need to make sure your db.define_table is created before your the auth tables
like this :
db.define_table('bank',
Field('name'),
format = '%(name)s')
auth.settings.extra_fields['auth_user'] =
[Field('bank', 'reference bank',
label = T('Bank'),
notnull = True,
required = True,
requires = IS_IN_DB(db, db.bank.id, '%(name)s') ),
]
auth.define_tables(username = True, signature = True)
custom_auth_table = db[auth.settings.table_user_name]
auth.settings.table_user = custom_auth_table
I have a model with two fields that are foreign keys to other models.
class Homepage(models.Model):
featured_user = models.ForeignKey('auth.user')
featured_story = models.ForeignKey('site_stories.story')
#staticmethod
def autocomplete_search_fields():
return ("featured_user__icontains", "featured_story__icontains",) # Is this right?
class HomepageAdmin(admin.ModelAdmin):
raw_id_fields = ('featured_user', 'featured_story',)
autocomplete_lookup_fields = {
'fk': ['featured_user'],
'fk': ['featured_story'] # <====== What should this be???
}
admin.site.register(Homepage, HomepageAdmin)
After reading the admin docs and trying a few things, it became clear that you literally need to use the label "fk" for grappelli to apply the autocomplete lookup formatting to a field. So... how can I do this with this model, where there are multiple foreign key fields?
class HomepageAdmin(admin.ModelAdmin):
raw_id_fields = ('featured_user', 'featured_story',)
autocomplete_lookup_fields = {
'fk': ['featured_user','featured_story'],
}