Unlocking Dynamic Content: Mastering JSON Parsing in HubSpot HubL for Personalized E-commerce

Hey there, ESHOPMAN readers! We often talk about leveraging HubSpot to its fullest, especially when it comes to creating dynamic and personalized experiences for your customers. Whether you're trying to build online store from scratch or just enhance your customer journey, getting your data to play nice across different HubSpot tools is key. Today, we're diving into a common developer headache that popped up recently in the HubSpot Community: parsing JSON strings from contact properties within HubL, specifically in email templates.

It's a fantastic goal – imagine storing a customer's recent activity, preferred routes, or even a mini-cart of abandoned items as a JSON string in a contact property, then dynamically displaying that information in a personalized email. Powerful stuff, right?

The HubSpot Community Dilemma: 'fromjson' Not Playing Nice

A community member recently posted about a challenge they were facing. They were trying to store a JSON string in a contact property (let's call it contact.rutas for this example, as they did) and then parse it using the fromjson filter in a HubSpot email component. Their goal was to iterate through an array within that JSON to display dynamic content like points of interest (POIs) with titles and descriptions.

They shared their code, which looked something like this:

{% set raw_rutas = contact.rutas %}

{% if raw_rutas and "{" in raw_rutas and "[" in raw_rutas %}
  {% set rutas = raw_rutas|fromjson %}

  {% for poi in rutas.pois %}
    
{{ poi.title }}
    
{{ poi.description }}
  {% endfor %}
{% endif %}

Or even a simpler attempt:

{% set raw_rutas = contact.rutas %}
{% set rutas = raw_rutas|fromjson %}

The problem? They kept hitting a wall with an error message: Invalid input for 'fromjson': input could not be converted to an object. This error is a common stumbling block for developers aiming to create highly personalized content within HubSpot's ecosystem.

Why the 'fromjson' Filter Might Fail: The Root Cause

The fromjson filter in HubL is designed to convert a valid JSON string into a usable HubL object (like a dictionary or list). When it throws an "Invalid input" error, it almost always points to one core issue: the string you're trying to parse is not a perfectly valid JSON string.

Common Culprits for Invalid JSON Strings:

• Malformed Syntax: Missing commas, unclosed brackets {} or square braces [], incorrect quotation marks. JSON is very strict about its syntax.
• Extra Characters: Leading or trailing whitespace, newlines, or other non-JSON characters accidentally included in the contact property value. Even a single extra space can invalidate the entire string.
• Unescaped Characters: If your JSON string contains characters that need to be escaped (like double quotes within a string value), and they aren't, it will break the JSON structure.
• Data Type Mismatch: While less common when retrieving from a text property, ensure the property actually contains a string.
• Empty or Null Values: If the contact property is empty or null, fromjson won't have valid input to process. The original poster's if raw_rutas and "{" in raw_rutas and "[" in raw_rutas check is a good start, but doesn't guarantee full JSON validity.

In many cases, the JSON string might look correct at first glance, but a subtle error prevents fromjson from interpreting it as a valid object. This is particularly crucial when data is being pushed into HubSpot contact properties from external systems or custom integrations, where proper serialization and escaping are paramount.

The ESHOPMAN Approach: Ensuring Valid JSON and Robust HubL Parsing

To successfully parse JSON from a HubSpot contact property, follow these best practices:

1. Ensure Data Integrity: Store Valid JSON

Before you even think about parsing, make sure the JSON string stored in your HubSpot contact property is absolutely valid. If you're pushing data via API, ensure your payload is correctly formatted and escaped. If you're manually entering it, use an online JSON validator to double-check its structure. For example, a valid JSON string for our rutas example might look like this:

{"pois": [{"title": "Eiffel Tower", "description": "Iconic landmark in Paris."}, {"title": "Louvre Museum", "description": "Home to thousands of works of art."}]}

Notice the escaped double quotes within the string itself. HubSpot's text properties handle this automatically if the string is correctly formatted when saved.

2. Implement Robust HubL Parsing with Error Handling

Once you're confident in your stored JSON, your HubL code needs to be resilient. Here’s a refined approach that incorporates better checks:

{% set raw_data_string = contact.rutas %}

{% if raw_data_string is string and raw_data_string|length > 0 %}
  {% try %}
    {% set parsed_data = raw_data_string|fromjson %}

    {% if parsed_data is iterable and "pois" in parsed_data %}
      
Your Personalized Route Highlights:
      

        {% for poi in parsed_data.pois %}
          

            
{{ poi.title }}
            
{{ poi.description }}
          
        {% endfor %}
      
    {% else %}
      
      
No route details available or data format incorrect.
    {% endif %}

  {% catch %}
    
    
Error parsing route data. Please contact support.
    
    
  {% endtry %}
{% else %}
  
No route information found for this contact.
{% endif %}

Let's break down the improvements:

• is string and length > 0: Ensures we're working with a non-empty string before attempting to parse.
• {% try %}...{% catch %}: This is crucial! It allows your HubL to gracefully handle errors thrown by fromjson if the input string is indeed invalid. Instead of crashing the email render, you can display a friendly message or a fallback.
• is iterable and key checks: After successful parsing, verify that the resulting object has the expected structure (e.g., it's a dictionary and contains the 'pois' key) before trying to iterate.

This robust structure ensures that your emails remain functional even if a contact's JSON data is malformed, providing a better user experience and easier debugging.

Beyond the String: When to Consider Custom Objects for E-commerce Data

While storing JSON strings in contact properties is viable for simpler, self-contained data sets, ESHOPMAN often recommends leveraging HubSpot's Custom Objects for more complex, relational e-commerce data. For instance, if your "routes" had many properties, associations to other objects (like products or locations), or required frequent updates, a Custom Object would provide a more structured and scalable solution.

However, for dynamic content within emails where the data is a simple list or configuration, JSON strings remain a powerful and flexible option, especially when combined with an agile crm shopify approach to development, allowing quick iterations on personalized communications.

Enhancing Your E-commerce Storefront with ESHOPMAN

At ESHOPMAN, we understand the importance of dynamic content for a compelling online store. Our platform, built on HubSpot, empowers you to create personalized customer journeys, from abandoned cart reminders to tailored product recommendations, all leveraging the power of your HubSpot CRM data. Mastering techniques like JSON parsing in HubL is just one step towards a truly integrated and responsive e-commerce experience.

Whether you're looking to build online store from scratch with deep HubSpot integration or optimize your existing setup, ESHOPMAN provides the tools and expertise to make your vision a reality. Say goodbye to static emails and hello to truly dynamic, data-driven customer engagement.

Conclusion

Parsing JSON strings from HubSpot contact properties using HubL's fromjson filter is a powerful technique for creating highly personalized and dynamic content. The key to success lies in ensuring the integrity of your stored JSON string and implementing robust error handling in your HubL templates. By following these guidelines, you can unlock new levels of personalization in your HubSpot emails and enhance the overall customer experience for your ESHOPMAN storefront.

Ready to transform your e-commerce personalization? Explore ESHOPMAN today!