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Decoupling Phoenix Forms from Ecto Changesets
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Source: elixirstreams.com
The content explains that Phoenix forms are commonly backed with an Ecto `changeset`, which is tightly coupled with database persistence logic. However, to separate the form (UI layer) from the changeset (data persistence layer), the author suggests using Phoenix's `to_form/2` helper and protocol. This allows developers to use a simple map instead of a changeset to back their forms, providing more control and separation between the UI and data layers. Additionally, handling errors can still be done effectively with this method by passing a map of errors to the `to_form/2` helper, thereby maintaining the same level of integration as with changesets. This approach also simplifies how data and errors are passed to and from the UI.
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