I have two folder collections, products and productCategories. I have a few product categories, two of which are "electronics" and "accessories". I have a relation field to choose the product category but I also have another relation field to select multiple accessories for that product.

I want to be able to limit or filter the products that you can select in the accessories relation field to only products that have the category relation field set to "accessories".

I'd like to display a section at the bottom of my product page that lists the accessories available for that product. Because these accessories are also products, the user can click any of them to view these products using the products template just like any other product.

Here is a snippet in my static/admin/config.yml.

collections:
  - name: "productCategories"
    label: "Product Categories"
    folder: "src/pages/product-categories"
    create: true
    slug: "{{fields.slug}}"
    fields:
      - { label: "Product Category Name", name: "title" }
      - { label: "Slug", name: "slug", required: true, pattern: ["^[a-z0-9]+(?:-[a-z0-9]+)*$", "Cannot contain spaces, capital letters, or special characters. You may separate words with dashes and numbers are allowed."], hint: "This will be used in the URL." }
  - name: "products"
    label: "Products"
    folder: "src/pages/products"
    create: true
    slug: "{{fields.slug}}"
    fields:
      - { label: "Product Name", name: "title" }
      - { label: "Slug", name: "slug", required: true, pattern: ["^[a-z0-9]+(?:-[a-z0-9]+)*$", "Cannot contain spaces, capital letters, or special characters. You may separate words with dashes and numbers are allowed."], hint: "This will be used in the URL." }
      - { label: "Category", name: "category", widget: "relation", collection: "productCategories", searchFields: ["title"], valueField: "slug", displayFields: ["title"] }
      - { label: "Overview", name: "overview", widget: "markdown" }
      - { label: "Price", name: "price" }
      - { label: "Accessories", name: "accessories", widget: "relation", collection: "products", searchFields: ["title"], valueField: "slug", displayFields: ["title"], multiple: true, required: false }
      - { label: "Related Products", name: "relatedProducts", widget: "relation", collection: "products", searchFields: ["title"], valueField: "slug", displayFields: ["title"], multiple: true, required: false }

Let me know if you need any clarification.

Uh oh!

Filter items in relation field by default #2405

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