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Using Attributes to Override Data Model Conventions


Using Attributes to Override Data Model Conventions

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Using Attributes to Override Data Model Conventions
Tag : chash , By : kraszie
Date : January 12 2021, 09:11 PM

around this issue When you configure an entity using attributes, that configuration will apply to any DbContext that entity appears in. If you want to configure the entity differently in two different DbContexts then use the fluent API configuration inside each DbContext.

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Is it possible to override names of model bound elements with attributes?


Tag : chash , By : fedorafennec
Date : March 29 2020, 07:55 AM
wish of those help
Do standard helpers support any attribute whcih allow abstract from model member names?

override ember-data's url conventions


Tag : ember.js , By : Sebastián Ucedo
Date : March 29 2020, 07:55 AM
Any of those help You can't do that unless you're doing a plain ol ajax call and push the payload to store or patch the adapter. I wouldn't recommend messing with ember data and its adapter as it will definitely come back to bite you. What you could do is pass in a parameter and change the logic in the API controller to do a if/else check on that param and send the relevant data that you need.
Route 1 - this.store.query('photo', { type: 'png' })

Override timestamp attributes on an ActiveRecord model


Tag : ruby-on-rails , By : Juice
Date : March 29 2020, 07:55 AM
This might help you The best practice would be to let ActiveRecord handle updating those values for you.
But if you still need to do some sort of computation you could try adding some callbacks to before_save and before_create to explicitly do that, something like this:
class User < ActiveRecord::Base
  before_save   :compute_updated_at
  before_create :compute_created_at, :compute_updated_at

  def created_at
    read_attribute(:created_at)
  end

  def created_at=(value)
    compute_created_at
  end

  def updated_at
    read_attribute(:updated_at)
  end

  def updated_at=(value)
    compute_updated_at
  end

  private

  def compute_updated_at
    write_attribute(:updated_at, Time.now + 1.month)
  end

  def compute_created_at
    write_attribute(:created_at, Time.now + 2.month)
  end
end

Does data attributes override method attributes in a class in Python?


Tag : python , By : n1ckless_id
Date : March 29 2020, 07:55 AM
should help you out I guess the tutorial is unfortunately (because ambiguously) phrased and by
class A:
        x = 111

class B1(A):
        x = 123  # Shadows A.x

assert B1.x == 123

del B1.x            # But after removing B1's own x attribute ...
assert B1.x == 111  # ... B1.x is just an alias to A.x !


# Shadowing can happen at any time:

class B2(A):
        pass

assert B2.x == A.x == 111

B2.x = 5  # shadowing attributes can also be added after the class definition

assert B2.x == 5
assert A.x == 111

del B2.x
assert B2.x == A.x == 111
class C:
        x = 555
        def x(self):
                print('I am x')

C().x()  # outputs "I am x"

del C.x
print(C.x) # AttributeError: 'C' object has no attribute 'x'
a = A()
assert a.x == 111  # instance namespace includes class namespace

a.x = 1000
assert a.x == 1000
assert A.x == 111  # class attribute unchanged

del a.x
assert a.x == 111  # sees A.x again

Override in the widget attributes the max_length set on the Model


Tag : django , By : Robin Buitenhuis
Date : March 29 2020, 07:55 AM
I wish this help you The widgets property in the Meta class modify only, well, the widgets, not the field attributes itself. What you have to do is redefine your model form field.
class ItemModelForm(forms.ModelForm):
    short_description = forms.CharField(max_length=400, min_length=200, widget=TextareaWidget())

    class Meta:
        model = Item
        fields = ['name', 'short_description', 'description']
        widgets = {
            'name': TextInputWidget(attrs={'placeholder': 'Name*'}),
        }
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