redink/dist/utils/hydrateInverse.js

RethinkDB model layer

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

/**
 * Hydrates the schema with type `type` with the appropriate inverse relationships by looking up
 * related schemas.
 *
 * @private
 * @param {Object} schemas - Redink schemas.
 * @param {String} type - The type of the schema whose inverse is to be hydrated.
 */
exports.default = function (schemas, type) {
  var invalidSchemaError = function invalidSchemaError(schemaType) {
    return new Error('Tried hydrating the \'' + schemaType + '\' schema\'s relationships\' inverses, but there was no ' + ('schema with type \'' + schemaType + '\'.'));
  };

  if (!schemas[type]) {
    throw invalidSchemaError(type);
  }

  var relationships = schemas[type].relationships;


  Object.keys(relationships).forEach(function (field) {
    var _relationships$field = relationships[field];
    var inverse = _relationships$field.inverse;
    var relatedType = _relationships$field.type;

    var relatedSchema = schemas[relatedType];

    if (!inverse) {
      throw new Error('Tried to hydrate the inverses on the \'' + type + '\' schema, but the inverse was not defined ' + ('for the \'' + field + '\' relationship.'));
    }

    if (!inverse.field) return;

    if (!relatedSchema) {
      throw invalidSchemaError(relatedType);
    }

    if (!relatedSchema.relationships[inverse.field]) {
      throw new Error('Encountered a malformed relationship when trying to register the schemas. Could not ' + ('find the \'' + inverse.field + '\' relationship on the \'' + relatedType + '\' schema.'));
    }

    var _relatedSchema$relati = relatedSchema.relationships[inverse.field];
    var inverseField = _relatedSchema$relati.field;
    var inverseRelation = _relatedSchema$relati.relation;
    var inverseType = _relatedSchema$relati.type;

    // eslint-disable-next-line

    schemas[type].relationships[field].inverse = {
      type: inverseType,
      field: inverseField,
      relation: inverseRelation
    };
  });
};
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