Testing for Dropdown Value I've set up a dropdown field for the client to choose from a list of pre-defined addresses.  In my template, I want to determine whether the field has a value or not.  When I look in the database, Entry A has a value of 'NULL', while Entry B has a value of 'address1'.  So the field is working properly in those regards.

However, in my template it's all or nothing.  Here is my code:

{% if event.includeMap|length %}
&lt;tr&gt;
    &lt;th class="small"&gt;
        Defined? {{ event.includeMap is defined }}&lt;br&gt;
        Not Null? {{ event.includeMap is not null }}&lt;br&gt;
        Null: {{ event.includeMap is null }}&lt;br&gt;
        Value: {{ event.includeMap }}
    &lt;/th&gt;
    &lt;td align="center"&gt;
        {% include 'partials/_inc-map' %}
    &lt;/td&gt;
&lt;/tr&gt;
{% endif %}


I've added the options in the left column to see what the database returns.  In both cases, they return the same values.  However, with Entry A, nothing is returned as a value, and in Entry B, the correct value appears.

I have also tried 

{% if event.includeMap is defined %}
{% if event.includeMap is not null %}


Any other thoughts?
If you've got a dropdown field defined with no value as one of the options, it should be as simple as:

{% if entry.dropdownFieldHandle %}
    {{ entry.dropdownFieldHandle }}
{% endif %}