For data models using Ecto. Options:

id_type: :uuid, :intid, :none — how to handle record ID features: [...] — a list of atoms as features, including:

        :short_id   — enable/disable ShortId

required: [:field, ...] — list of fields required for this model update: [:field, ...] — list of fields allowed to be updated on this model create: [:field, ...] — list of additional fields allowed only on creation.

                      unlike the other fields, whatever is provided is
                      concatenated to required and update. This defaults
                      to `[:id]`, so specify it as `[]` for no additional
                      create fields.

atomic: [:field, ...] — if included the fields will be used when doing a

                      conditional/atomic update with `assert: %{}` as
                      an optional argument to update()

foreign_keys: [:field, ...] - list of foreign key constraints (if any) unique: [:field, ...] — list of unique constraints (if any) debug: true — will print out some compile-time information for debugging

Note:fk and unique may also be tuple: {:key, [keyword-list options]}

Recap:

• create: ONLY on create, but is still optional (default: :id)
• required: MUST exist on create, and at the intersection of required and update, those values must also exist
• update: things that can be updated