How can I update a Model and do something with this object or other?

My model has 7 fields, but I want update a only field. I'm using CBC(generic.UpdateView) with model and form_class. My forms works normally, but,
I want do things depending on value for this Field.

I don't know what method override.

ModelA:

atribute_a

atribute_b

atribute_c

I need change only atribute_a, but atribute_b is a dateTime, and a I want update atribute_b with timezone.now() when update atribute_a, and after that I want update a another object with ForeignKey with atribute_c for example.

basically in a UpdateView, I want this:
In a some method(save, post, dispatch or other)

atribute_b = timezone.now()

if atribute_a == 'abc':

    ModelB.objects.filter(atribute_c=atribute_c).update(atribute_c = atribute_c+1)

edited Nov 20 '18 at 6:36

Aqueous Carlos

364314

asked Nov 20 '18 at 3:23

Matheus Soares

417

Did you look at Django Signals, I would check out the post_save and pre_save signals. You can also override the model's save method, but I don't think that's good practice

– robotHamster
Nov 20 '18 at 4:06

you can add auto_now to attribute_b

– ruddra
Nov 20 '18 at 4:26

This a update, auto_now when object is created, I want the time when object will change. The signal is when, always object have changes, created or updated, I want make changes only in this casa?

– Matheus Soares
Nov 20 '18 at 11:16

How can I make Update with TemplateView??

– Matheus Soares
Nov 20 '18 at 11:17

add a comment |

I don't know what method override.

ModelA:

atribute_a

atribute_b

atribute_c

basically in a UpdateView, I want this:
In a some method(save, post, dispatch or other)

atribute_b = timezone.now()

if atribute_a == 'abc':

    ModelB.objects.filter(atribute_c=atribute_c).update(atribute_c = atribute_c+1)

edited Nov 20 '18 at 6:36

Aqueous Carlos

364314

asked Nov 20 '18 at 3:23

Matheus Soares

417

Did you look at Django Signals, I would check out the post_save and pre_save signals. You can also override the model's save method, but I don't think that's good practice

– robotHamster
Nov 20 '18 at 4:06

you can add auto_now to attribute_b

– ruddra
Nov 20 '18 at 4:26

This a update, auto_now when object is created, I want the time when object will change. The signal is when, always object have changes, created or updated, I want make changes only in this casa?

– Matheus Soares
Nov 20 '18 at 11:16

How can I make Update with TemplateView??

– Matheus Soares
Nov 20 '18 at 11:17

add a comment |

I don't know what method override.

ModelA:

atribute_a

atribute_b

atribute_c

basically in a UpdateView, I want this:
In a some method(save, post, dispatch or other)

atribute_b = timezone.now()

if atribute_a == 'abc':

    ModelB.objects.filter(atribute_c=atribute_c).update(atribute_c = atribute_c+1)

edited Nov 20 '18 at 6:36

Aqueous Carlos

364314

asked Nov 20 '18 at 3:23

Matheus Soares

417

I don't know what method override.

ModelA:

atribute_a

atribute_b

atribute_c

basically in a UpdateView, I want this:
In a some method(save, post, dispatch or other)

atribute_b = timezone.now()

if atribute_a == 'abc':

    ModelB.objects.filter(atribute_c=atribute_c).update(atribute_c = atribute_c+1)

python django django-models django-views

edited Nov 20 '18 at 6:36

Aqueous Carlos

364314

asked Nov 20 '18 at 3:23

Matheus Soares

417

edited Nov 20 '18 at 6:36

Aqueous Carlos

364314

asked Nov 20 '18 at 3:23

Matheus Soares

417

edited Nov 20 '18 at 6:36

Aqueous Carlos

364314

edited Nov 20 '18 at 6:36

Aqueous Carlos

364314

edited Nov 20 '18 at 6:36

Aqueous Carlos

364314

asked Nov 20 '18 at 3:23

Matheus Soares

417

asked Nov 20 '18 at 3:23

Matheus Soares

417

asked Nov 20 '18 at 3:23

Matheus Soares

417

Did you look at Django Signals, I would check out the post_save and pre_save signals. You can also override the model's save method, but I don't think that's good practice

– robotHamster
Nov 20 '18 at 4:06

you can add auto_now to attribute_b

– ruddra
Nov 20 '18 at 4:26

This a update, auto_now when object is created, I want the time when object will change. The signal is when, always object have changes, created or updated, I want make changes only in this casa?

– Matheus Soares
Nov 20 '18 at 11:16

How can I make Update with TemplateView??

– Matheus Soares
Nov 20 '18 at 11:17

add a comment |

Did you look at Django Signals, I would check out the post_save and pre_save signals. You can also override the model's save method, but I don't think that's good practice

– robotHamster
Nov 20 '18 at 4:06

you can add auto_now to attribute_b

– ruddra
Nov 20 '18 at 4:26

This a update, auto_now when object is created, I want the time when object will change. The signal is when, always object have changes, created or updated, I want make changes only in this casa?

– Matheus Soares
Nov 20 '18 at 11:16

How can I make Update with TemplateView??

– Matheus Soares
Nov 20 '18 at 11:17

Did you look at Django Signals, I would check out the post_save and pre_save signals. You can also override the model's save method, but I don't think that's good practice

– robotHamster
Nov 20 '18 at 4:06

you can add auto_now to attribute_b

– ruddra
Nov 20 '18 at 4:26

This a update, auto_now when object is created, I want the time when object will change. The signal is when, always object have changes, created or updated, I want make changes only in this casa?

– Matheus Soares
Nov 20 '18 at 11:16

How can I make Update with TemplateView??

– Matheus Soares
Nov 20 '18 at 11:17

add a comment |

1 Answer
1

active

oldest

votes

I used def save(self, commit=True): in my forms.py, and in my view.py I used generic.UpdateView with model and form_class.

code from my forms.

class MyForm(ModelForm):

    class Meta:

        fields = ['atribute_a']

        exclude = ['atribute_b', 'atribute_c']



    def save(self, commit=True):

        instance = super(MyForm, self).save(commit=False)

        instance.atribute_b = timezone.now()

        # do something with FK

answered Nov 20 '18 at 17:22

Matheus Soares

417

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

I used def save(self, commit=True): in my forms.py, and in my view.py I used generic.UpdateView with model and form_class.

code from my forms.

class MyForm(ModelForm):

    class Meta:

        fields = ['atribute_a']

        exclude = ['atribute_b', 'atribute_c']



    def save(self, commit=True):

        instance = super(MyForm, self).save(commit=False)

        instance.atribute_b = timezone.now()

        # do something with FK

answered Nov 20 '18 at 17:22

Matheus Soares

417

add a comment |

I used def save(self, commit=True): in my forms.py, and in my view.py I used generic.UpdateView with model and form_class.

code from my forms.

class MyForm(ModelForm):

    class Meta:

        fields = ['atribute_a']

        exclude = ['atribute_b', 'atribute_c']



    def save(self, commit=True):

        instance = super(MyForm, self).save(commit=False)

        instance.atribute_b = timezone.now()

        # do something with FK

answered Nov 20 '18 at 17:22

Matheus Soares

417

add a comment |

I used def save(self, commit=True): in my forms.py, and in my view.py I used generic.UpdateView with model and form_class.

code from my forms.

class MyForm(ModelForm):

    class Meta:

        fields = ['atribute_a']

        exclude = ['atribute_b', 'atribute_c']



    def save(self, commit=True):

        instance = super(MyForm, self).save(commit=False)

        instance.atribute_b = timezone.now()

        # do something with FK

answered Nov 20 '18 at 17:22

Matheus Soares

417

I used def save(self, commit=True): in my forms.py, and in my view.py I used generic.UpdateView with model and form_class.

code from my forms.

class MyForm(ModelForm):

    class Meta:

        fields = ['atribute_a']

        exclude = ['atribute_b', 'atribute_c']



    def save(self, commit=True):

        instance = super(MyForm, self).save(commit=False)

        instance.atribute_b = timezone.now()

        # do something with FK

answered Nov 20 '18 at 17:22

Matheus Soares

417

answered Nov 20 '18 at 17:22

Matheus Soares

417

answered Nov 20 '18 at 17:22

Matheus Soares

417

answered Nov 20 '18 at 17:22

Matheus Soares

417

add a comment |

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