Django Template Nested for with If Statement

Question

I'm trying to create a selection box in a HTML table where the given name should be selected in the combo box. In order to do this, I need to create a nested loop. The outer loop creates the rows, whereas the inner loop fills the grid cell with options for "Resources". For this example I'm only showing the code creating the Resource cell.

The nested loop creates the items, and contains an if statement comparing the action.owner value with the resource.name value. If the items match, the option value should be selected. The server runs with the code, and I cannot find any hidden problems. However I'm not getting the expected results. No item is being selected. Any idea what I'm doing wrong?

Note that I have only started learning Django and web development a week ago!

{% for action in actions %}
<tr>
    <td>
        <SELECT class="custom-select">

        {% for resource in resources %}

        <option value = "{{resource.name}}" {% if action.owner == resource.name %}selected="selected"{% endif %}>{{resource.name}}</option>

        {% endfor %}

        </SELECT>
    </td>

</tr>
{% endfor %}

Some HTML output for a random row that I selected with a dummy html tag to show which action.owner was in question:

              <td>
                  <SELECT class="custom-select">

                      <option value = "None" actionOwnerVal = John >None</option>
                      <option value = John" actionOwnerVal = John >John</option>
                      <option value = "Bob" actionOwnerVal = John >Bob</option>
                  </SELECT>
                </td>

The Actions class:

actionChoices = (
    ('New','New'),
    ('In Progress','In Progress'),
    ('Critical','Critical'),
    ('Done','Done')
)


class Actions(models.Model):
    project = models.ForeignKey(Projects, on_delete=models.CASCADE)
    task = models.CharField(max_length=500)
    owner = models.ForeignKey(Resources, on_delete=models.CASCADE,default = 0)
    closureDate = models.DateTimeField(default = datetime.now,blank=True)
    status = models.CharField(max_length=500,choices=actionChoices,default='New')
    notes = models.CharField(max_length=1000)

    def __str__(self):
        return(self.task)

    class Meta:
        verbose_name_plural = "Actions"

The Resources class:

class Resources(models.Model):
    name = models.CharField(max_length=200)

    def __str__(self):
        return(self.name)

    class Meta:
        verbose_name_plural = "Resources"

I refer you to that great debugging aid: "When in doubt, print it out!" Make another similar loop above this one, that just prints resource.name and action.owner. — John Gordon
– John Gordon, Commented Mar 6, 2018 at 14:25
From what I can see the code should produce the result you want. Could you post the HTML that is produced? — Karl Graham
– Karl Graham, Commented Mar 6, 2018 at 14:25
Is action.owner a string, or is it some sort of custom user class object? — John Gordon
– John Gordon, Commented Mar 6, 2018 at 14:27
A select tag shouldn't have a value attribute. Though I haven't seen your models, I'm not sure that action.owner and resource.name could ever be the same thing. — Rob L
– Rob L, Commented Mar 6, 2018 at 14:37

John Gordon · Accepted Answer · 2018-03-06 18:27:41Z

2

resource and action.owner are both Resource objects, so you should be comparing resource.name to action.owner.name.

action.owner appeared to be a string value when printed in the template, because its class defines a __str__ method.

answered Mar 6, 2018 at 18:27

John Gordon

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