mongoose-detective/src/index.js

Find the referenced model name at a specified path.

'use strict'

module.exports = (model, path) => {
  const keys = path.split('.')
  let schema = model.schema
  let schemaPath = ''

  for (let i = 0, length = keys.length; i < length; i++) {
    if (schemaPath.length > 0) {
      schemaPath += '.'
    }

    schemaPath += keys[i]

    if (schema.path(schemaPath) && schema.path(schemaPath).schema) {
      schema = schema.path(schemaPath).schema
    }
  }

  if (!schema) {
    return
  }

  schemaPath = schema.path(keys[keys.length - 1]) || schema.path(schemaPath)

  if (!schemaPath && (!model || !model.discriminators)) {
    return
  }

  if (schemaPath.caster && schemaPath.caster.options) {
    return schemaPath.caster.options.ref
  } else if (schemaPath.options) {
    return schemaPath.options.ref
  }
}