Display Ecto Errors for Live Resources

[sneha-saj]

How can I display errors returned by Ecto changesets in my app? For example, when a unique constraint error occurs (e.g., attempting to create an entry with a duplicate name), it should trigger an error message. Currently, my application gets stuck on the creation screen without displaying any error.

[Flo0807]

You have to add the error under the name of a field you are displaying.

For example, if you have a username field like this

username: %{
  module: Backpex.Fields.Text,
  label: "Username"
},

you need to add the error under the username key to the changeset.

Ecto.Changeset.unique_constraint/3 also has an error_key option, which in this case should be :username.

@sneha-saj