Add key value pairs to ?changeset. If ?changeset is a model record then create a new changeset. Key value pairs will be added to :changeset/params.

Cast the map m to a record of ?model. Any unknown keys will be discarded. Strings and keywords will be converted to qualified-keywords.

Create a changeset to be inserted into the database. Changesets can either be used to create or update a row.

params will update the record with the fields supplied. params must be cast to a proper model record. If no other map is supplied, the changeset will create a new row on save!.

origin is a map of the original record to be updated. If an origin map is provided, and the primary-key is not nil, it will update the row on save!

validators can also be supplied to perform extra checks on the entire resulting record.

Merge maps into ?changeset. If ?changeset is a model record then create a new changeset. All maps in m will be merged into :changeset/params.

Update ?changeset with key value pairs. If ?changeset is a model record then create a new changeset. Key value pairs will be update in :changeset/params. If a key is not found in :changeset/params, the key will be taken from :changeset/origin, updated, and added to :changeset/params.