Function createModelChain

dadi/lib/fields/reference.js:14–46

* Creates an array of Model instances corresponding to a * field query, potentially including dot-notation. * * @param {Model} rootModel - instance of the base/root model * @param {Array } fields - array of node fields * @return {Array }

(rootModel, fields)

 * @return {Array<Model>}
 */
function createModelChain(rootModel, fields) {
  return fields.reduce((chain, field, index) => {
    if (chain.length === 0) {
      return chain.concat(rootModel)
    }

    const nodeModel = chain[chain.length - 1]
    const referenceField = nodeModel.getField(fields[index - 1].split('@')[0])

    // Validating the node and flagging an error if invalid.
    if (
      !referenceField.type ||
      !referenceField.type.length ||
      referenceField.type.toLowerCase() !== 'reference'
    ) {
      return chain.concat(null)
    }

    const referenceCollection =
      field.split('@')[1] ||
      (referenceField.settings && referenceField.settings.collection)

    // If there isn't a `settings.collection` property, we're
    // dealing with a self-reference.
    if (!referenceCollection) {
      return chain.concat(nodeModel)
    }

    const referenceModel = rootModel.getForeignModel(referenceCollection)

    return chain.concat(referenceModel)
  }, [])
}

module.exports.beforeOutput = function({
  client,