breadcrumb is not working as expected - missing query parameter

[harryc2020]

Hi,

I am trying to implement breadcrumbs in the powerapps portal, I add the following breadcrumb snippets into Layout 1 column web template.

 <ul class=breadcrumb>

    {% for crumb in page.breadcrumbs -%}

      <li> <a href={{ crumb.url }}>{{ crumb.title }}</a> </li>

   {% endfor -%}

   <li class=active>{{ page.title }}</li>

</ul>

It shows the breadcrumbs correctly when I navigate to a different page, however when I try to navigate back to the parent page by clicking the breadcrumb, it doesn't go back to the parent page successfully. The reason was because the <a> tag constructed was missing the query parameter which identify the id. 

/en-US/account-maintenance-form/?id=xxx

Is there any way to add the query param onto the breadcrumb.url?

Thanks,

Harry

[OliverRodrigues]

Hi, there is already an existing code for the breadcumbs logic

For example my Layout 1 Column code is like this:

<div class="wrapper-body">
    <div class="container">
        <div class="page-heading">
            {% block breadcrumbs %}
            {% include 'Breadcrumbs' %}
            {% endblock %}
            {% block title %}
            {% include 'Page Header' %}
            {% endblock %}
        </div>
    </div>
    {% block main %}
    {% include 'Page Copy' %}
    {% endblock %}
    <div class="push"></div>
</div>

and finally I have another Web Template just for breadcumbs:

{% assign title = title | default: page.title %}

<ul class="breadcrumb">
 {% for crumb in page.breadcrumbs -%}
 <li>
  <a href="{{ crumb.url | h }}" title="{{ crumb.title | h }}">{{ crumb.title | truncate: 24 | h }}</a>
 </li>
 {% endfor -%}
 <li class="active">{% block activebreadcrumb %}{{ title | h }}{% endblock %}</li>
</ul>

hope this helps
------------

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[justinburch]

Hi @harryc2020,

This is because the template is attempting to be generic - if my Parent page is for Opportunity, and my Child Page is for "Products," then they likely have two different "id" params. If both parent and child page reference the same record, you'll have no problem.

You'll want to make the below changes, keeping in mind that this can cause odd behavior if you setup your hierarchy like the example I used - in which case you'll want to make this a unique Web & Page Template combo. Every page back to Home will continue the ID, until you've clicked a link that replaces it.

<ul class="breadcrumb">
 {% for crumb in page.breadcrumbs -%}
 <li>
  <a href="{{ crumb.url | add_query: 'id', params.id }}" title="{{ crumb.title | h }}">{{ crumb.title | truncate: 24 | h }}</a>
 </li>
 {% endfor -%}
 <li class="active">{% block activebreadcrumb %}{{ title | h }}{% endblock %}</li>
</ul>

If you want to copy more than the ID - for example, Opportunity previously used "opptyId" and Products used "prodId", all stemming from an Account with "id" (account?id=AccountId&opptyId=OpportunityId&prodId=ProductId), then you can instead use the following

<ul class="breadcrumb">
 {% for crumb in page.breadcrumbs -%}
 <li>
  <a href="{{ crumb.url | append: request.query }}" title="{{ crumb.title | h }}">{{ crumb.title | truncate: 24 | h }}</a>
 </li>
 {% endfor -%}
 <li class="active">{% block activebreadcrumb %}{{ title | h }}{% endblock %}</li>
</ul>

[harry_c2020]

Thanks Justin,

It doesn't work as expected. However I managed to get it work up to 3 levels, however after 4th level, I could only manage to go back to the previous level but not the previous parent. The reason that it wasn't working was the refid was missing in the fourth level.

Here is my code so far:

<ul class=breadcrumb>
    {% for crumb in page.breadcrumbs %}
       {% if request.query contains "refid" %}
           {% assign a = request.query | split: 'refid=' %}
           {% assign b = a[1] | split: '&refrel' %}
           {% assign refid = b[0] %}
           <li><a href="{{ crumb.url | append: '?id=' | append: refid }}" title="{{ crumb.title | h }}">{{ crumb.title | truncate: 24 | h }}</a>   </li> 
       {% else %}
           <li><a href={{ crumb.url | escape }}>{{ crumb.title | escape }}</a></li>
      {% endif %}
{% endfor %}

Any idea how to preserve the refId ?

Thanks,

Harry

[justinburch]

Hi @harry_c2020,

It's easier to use the appropriate filters vs. split/append when you can - params.refid is how you would get the refid value, and then you can just re-use it. Similarly, typically avoid append (unless you know the URL is clean) and just use add_query. An example is {{ url | add_query: 'refid', params.refid }}. Consider the following changes - if you need refrel for anything, just use params.refrel (which is shorthand for request.params['refrel']

<ul class=breadcrumb>
    {% for crumb in page.breadcrumbs %}
       {% assign refid = request.refid %}
       {% if refid %}
           <li><a href="{{ crumb.url | add_query: 'id', refid }}" title="{{ crumb.title | h }}">{{ crumb.title | truncate: 24 | h }}</a></li> 
       {% else %}
           <li><a href="{{ crumb.url | escape }}">{{ crumb.title | escape }}</a></li>
      {% endif %}
{% endfor %}

If you can share an example URL (feel free to anonymize), it might be easier to help work through. Right now, all I know is that at some point you have a related record using refid and refrel would be the relationship schema between two entities, and when you go back one level you want to use the refid as the ID - is the reason you're splitting due to multiple layers of encoded refids?

[harry_c2020]

Hi Justin,

Thanks for the response. it still doesn't work as expected.

I also need to change your code to 

request.params['refid'] instead of  request.refid to get the parameter value.

Here are the examples of the Url

home > Supplier details > Product

https://xxx.powerappsportals.com/en-US/account-maintenance-form/product/?id=1614ee6f-80f1-ea11-a815-...

The refid refers to the Supplier id which is abc.

We can go back to Supplier details as the supplier id provided in the refid (abc) is correct. 

However if user go to another level (e.g product spec), the bread crumb would be

home > Supplier details > Product > Product Spec and its url is

https://xxx.powerappsportals.com/en-US/account-maintenance-form/product/product-specification/?id=c5...def&refrel=pid_pid_productrecord_pid_productspecificatio

The refid in the above query string now changed to def and it's the id of the product, but not the id of Supplier. We can go back to its immediate parent (Product) but when we try to go back to Supplier details, it gave an error 

An unknown failure has occurred. Error ID # [fff8d419-74dc-4a75-b683-7c344ea6b64d]

Maybe I am using the wrong approach. Any advice would be appreciated.

Thanks,
Harry

[justinburch]

My apologies @harry_c2020, "request.refid" should have been "params.refid", as mentioned in the description above the code block.
Your explanation helps in describing the problem. This is because breadcrumbs are based on Web Page relationships, not entity relationships - all the breadcrumb code does is navigate through the hierarchy of Web Page links. In order for you to also maintain a history of the IDs related to those pages, your URL would need to grow exponentially.

Your best option is to use Liquid to retrieve attributes based on the breadcrumb loop's current page instead of relying on the URL for related records - e.g.:

<ul class=breadcrumb>
  {% if page.adx_partialurl == 'product-specification' %}
    {% assign prodId = params.refid %}
    {% assign prod = entities['new_product'][prodId] %}
    {% if prod and prod.new_accountid %}
      {% assign acctId = prod.new_accountid %}
    {% endif %}
  {% elsif page.adx_partialurl == 'product' %}
    {% assign prodId = params.id %}
    {% assign prod = entities['new_product'][prodId] %}
    {% if prod and prod.new_accountid %}
      {% assign acctId = prod.new_accountid %}
    {% endif %}
  {% endif %}
  {% for crumb in page.breadcrumbs %}
    {% assign bUrl = crumb.url %}
    {% if bUrl contains '/product/' %}
      {% assign bUrl = bUrl | add_query: 'id', prodId %}
    {% elsif bUrl contains '/account-maintenance-form/' %}
      {% assign bUrl = bUrl | add_query: 'id', acctId %}
    {% endif %}
    <li><a href="{{ crumb.url | truncate: 24 | escape }}">{{ crumb.title | escape }}</a></li>
  {% endfor %}

Note that this will require you to update the breadcrumb to add in additional branches for every subsequent child page/entity (replacing the first if to ensure it only triggers on the deepest child), and that this will work only for this particular hierarchy.

If you want to simplify things, change your various ID fields at the Entity Form level so that you don't have to change 'id', and can instead include them all - e.g. for account

[harry_c2020]

Hi Justin,

Thanks for the solution. It works as expected.

I'll try later to simplify things as you suggested.

Kind Regards,
Harry

[justinburch]

Thanks @harry_c2020, feel free to respond here if you have more questions. If the above solution helped, please consider marking it as resolved so that other users can find the same solution more easily.

[harry_c2020]

Hi Justin,

I couldn't see accept or resolve button so I couldn't mark it as resolved. I can only see "Like" and "Reply".

How do you accept it as a solution?

Thanks,
Harry