Django admin action with intermediate page: not getting info back

问题

I'm trying to create an admin action that adds a custom time delta to some date. The time delta will be read from a input in the intermediate page. After confirming it, I will apply that delta to every instance selected previously. Using this code (I simplified for this question) I can't get the value of the entered time delta. I can't tell whether the user pressed the "Apply" button.

models.py

class Match(models.Model):
    date_of_match=models.DateTimeField()

admin.py

class MatchAdmin(admin.ModelAdmin):
    actions=('move_date',)
def move_date(self,request,queryset):
    if 'apply' in request.POST:
        #to do, add timedelta to date_of_match
        print("I'M IN!")
    return render(request.'admin/move_date.html',{'matches':queryset})
move_date.short_description="Move date"

move_date.html

{% extends "admin/base_site.html" %}
{% block content %}
<form action="" method="post">{% csrf_token %}
    <p>How much delta?<p>
    <input type="number" step="1" value="days"/>
    <input type="hidden" name="action" value="move_date" />
    <input type="submit" name="apply" value="Apply"/>
</form>
{% endblock %}

回答1:

Probably too late to help OP, but I came across this question when having the same issue and it was not immediately obvious looking elsewhere what was going on.

When the changelist_view is processed (the view we are POSTing to) it looks in request.POST for a specific key: _selected_action which is defined in django.contrib.admin.helpers as ACTION_CHECKBOX_NAME. I used the delete action that is built into the admin for reference, and it uses it this way in the template:

{% for obj in queryset %}
  <input type="hidden" name="{{ action_checkbox_name }}" value="{{ obj.pk|unlocalize }}">
{% endfor %}

then in your context you just need to:

context = {
    'queryset': queryset,  # method param
    'action_checkbox_name': helpers.ACTION_CHECKBOX_NAME,
}

Now your method gets called again when you POST your form, and you can detect/handle the POST as you're trying to do here. (You want to return None from the block that handles your POST data so the view knows to go back to the list view.)

来源：https://stackoverflow.com/questions/52845346/django-admin-action-with-intermediate-page-not-getting-info-back

标签

python

django

action