Output of matrix field twice in one template

Question

I have a matrix field with with multiple types. In a template I want to loop through all of the entries of that matrix field as you normally would. However, I also want to access a bit of data from a specific type and I can not figure out how to do it. Very frustrating. Definitely would have been a no brainer to do in craft 2.5.

The matrix field has a type of "Instructor" which is an entry type. The entry has a field of "FullName".

So I want to say, if there is an entry type of Instructors in the matrix field, then output the full name of each entry selected in the matrix field of type "Instructor".

I've tried various methods based on the matrix blocks documentation and nothing works. The closest I get is the ID of the matrix field entry. Here is one example that should explain what I'm attempting to do.

  {% set classBlocks = entry.classBlocks %}
  {% if classBlocks|length %}
    {% set instructors = clone(classBlocks).type('instructors').all() %}
    by <strong>
      {% for instructor in instructors %}
        {% if not loop.first %}, {% endif %}
        {{ instructor.fullName }}
      {% endfor %}
    </strong>
  {% endif %}

Is this even possible? Seems pretty simple. At least in craft 2.5 I could have just looped through the matrix field and if the type was 'instructors' loop through the instructor entries outputting their full name.

Answer 1

Here's how I would approach this...

{% set classBlocks = entry.classBlocks.all() %}

{% if classBlocks | length %}
    {% set instructors = classBlocks | filter(block => block.type == 'instructors') %}
    by <strong>{{ instructors | map(instructor => instructor.fullName) | join(', ', ', and ') }}</strong>
{% endif %}

We're using several filters here to achieve what I think you're trying to achieve:

• | filter is used to filter just the instructor blocks out of all your class blocks; this saves us from having to do the cloning and extra query mess and is more performant.
• | map is used to take our array of instructor blocks and return an array containing just their names.
• | join is used to take the array of names and create a nice readable list (I find it cleaner than doing the loop checking like you're doing) - e.g. "Bob, Matt, and Susy"

Let me know in the comments if you have any questions or if I'm not understanding the question correctly!