CODEWITHSUNDEEP
pythondjangodjango-admindjango-admin-actions
Wagh
Wagh

Reputation: 4306

make django model field read only or disable in admin while saving the object first time

I want to disable the few fields from model in django admin while saving initially. 

"<input type="text" id="disabledTextInput" class="form-control" placeholder="Disabled input">"

like this.

My model is:

class Blogmodel(models.Model):
    tag = models.ForeignKey(Tag)
    headline = models.CharField(max_length=255)
    image=models.ImageField(upload_to=get_photo_storage_path, null=True, blank=False)
    body_text = models.TextField()
    pub_date = models.DateField()
    authors = models.ForeignKey(Author)
    n_comments = models.IntegerField()

i want to disable the "headline" and "n_comments". i tried it in admin.py file, but its not disabling the fields on initial saving. But for editing the fields its working, it making the fields read only.

in admin.py 

class ItemAdmin(admin.ModelAdmin):
    exclude=("headline ",)
    def get_readonly_fields(self, request, obj=None):
        if obj:
            return ['headline']
        else:
            return []

Headling getting disabled but for edit only. i want to disable it at the time of object creation. i.e. first save. can anyone guide me for this?

Upvotes: 30

Views: 48495

Answers (4)

Subham Srivastava
Subham Srivastava

Reputation: 121

Just do editable=False, while adding the field in the model

headline = models.CharField(max_length=255,editable=False)

It wont be editable and you cannot see the field from admin panel, but you can add values to them from a method within the model

Upvotes: 12

Tom&#225;s Ag&#250;
Tom&#225;s Ag&#250;

Reputation: 86

Other way is:

    def get_form(self, request, obj=None, **kwargs):
        form = super().get_form(request, obj=None, **kwargs)

        if obj is None:

            form.base_fields["my_field"].disabled = True

        return form

Upvotes: 5

Bernhard Vallant
Bernhard Vallant

Reputation: 50796

If you want to make the field read-only during creation you should do it the other way round:

def get_readonly_fields(self, request, obj=None):
    if obj is None:
        return ['headline']
    return []

Upvotes: 16

GwynBleidD
GwynBleidD

Reputation: 20569

There is no need to override get_readonly_fields. Simplest solution would be:

class ItemAdmin(admin.ModelAdmin):
    exclude=("headline ",)
    readonly_fields=('headline', )

When using readonly_fields you can't override get_readonly_fields, because default implementation reads readonly_fields variable. So overriding it only if you have to have some logic on deciding which field should be read-only at time.

Upvotes: 86

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