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How to get one product to modify information in the cart in Shopify?

If a customer clicks a certain button in my Shopify store, I’d like to be able to add information to my cart using Liquid (or whatever is needed). This information can be as simple as a string. The customer won’t see this information, but it will be used to modify the look of the cart page. I can happily parse it/handle it as a string, if that’s my only option, but so far I can’t get any information to be sent. I have tried modifying cart.note using a {% capture %} block, but that never ended up modifying anything permanently. I also am not sure how to change line_item properties, but that might do it as well.

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2

Answers


  1. 0

    You can add input fields with the name properties[some-prop-name] to your product form, which would include the required linking data

    For example, adding the following input to your product form would add a line-item property to your product as you add it:

    <input type="checkbox" name="properties[_add_to_box]" value="{{ box_identifier }}" />

    If you want to dynamically update line-item properties to add/rearrange items in boxes post-hoc you can do so using AJAX requests targeting the /cart/change.js endpoint

    Here’s an example of such a command, which you would run upon the user changing the appropriate input element:

    /* Assuming we have a variable named cart (containing the cart JSON) and the the 0-based index for the item we want to update */

var line = index + 1;  //Shopify uses 1-based indexing for line-items
var qty = cart.items[index].quantity;

jQuery.ajax({
  url:'/cart/change.js',
  type:'post',
  dataType:'json',
  data:{
   line: line, /* Line to edit: REQUIRED */
   quantity: qty, /* 'New' quantity - If omitted, the line will change to quantity 1! */
   properties:{
     /*
      This properties object will replace any existing properties object on the line-item, so be sure to include everything, not just what you're changing!
      Properties with keys that are prepended with an underscore (_) are hidden in Shopify's checkout page.  
     */
     _box_id: 'box01',
     'Congratulatory Message':'Hooray! You did it!'
   }
  },
  success:function(cart){
    console.log('Success!', cart)
  },
  error:function(err){
    alert('Something went wrong!', err)
  }
 
})

    Hopefully this helps you get your feature in!

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  2. 0

    You can store that data in the line item properties.

    Get customization information for products with line item properties

    You can collect customization information for products using line item properties. Line item properties are custom form fields that you can add to the product page, allowing customers to make choices or add information about a product. For example, if you offer product engraving, then you can use line item properties to let customers enter the text that they want engraved on the product.

    Then you can access the line item properties from your liquid template.

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