Customize dropdown list from django admin panel
<p>I added a dropdown list on my html file however I want to give an opportunity to some users to edit its content from django admin panel. To do this, I want to put a textbox into the admin panel that adds an item into the dropdown list and when a user write "apple" on the textbox, for example, "apple" will be added into the dropdown list.</p>

<p>Actually what I want to learn is that how to customize a dropdown list? I mean now I have an model that like this;</p>

<pre><code>class Industry(models.Model):
    TYPES = (
        ('apple', 'apple'),
        ('orange', 'orange'),
    )
    type = models.CharField(max_length=30, choices=TYPES)
</code></pre>

<p>What I want is that I enable users to put their own TYPES.</p>

<p>Thank you in advance. </p>