Model Change with Changesets
Let's learn how forms and changesets work.
We'll cover the following
Ecto changesets
Changesets are policies for changing data, and they fulfill these roles:
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Changesets cast unstructured user data into a known, structured form to ensure data safety. The most common structure is an Ecto database schema.
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Changesets capture differences between safe, consistent data and a proposed change, allowing efficiency.
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Changesets validate data using known consistent rules, ensuring data consistency.
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Changesets provide a contract for communicating error states and valid states, ensuring a common interface for change.
We can see changesets in action in the Product.changeset/2
function in pento/lib/pento/catalog/product.ex
:
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