Method forModel

lib/mapping/mapper.js:89–115

* Gets a [ModelMapper]module:mapping~ModelMapper that is able to map documents of a certain model into * CQL rows. * @param {String} name The name to identify the model. Note that the name is case-sensitive. * @returns {ModelMapper} A [ModelMapper]module:mapping~ModelMapper

(name)

   * @returns {ModelMapper} A [ModelMapper]{@link module:mapping~ModelMapper} instance.
   */
  forModel(name) {
    let modelMapper = this._modelMappers.get(name);

    if (modelMapper === undefined) {
      let mappingInfo = this._modelMappingInfos.get(name);

      if (mappingInfo === undefined) {
        if (!this.client.keyspace) {
          throw new Error(`No mapping information found for model '${name}'. ` +
            `Mapper is unable to create default mappings without setting the keyspace`);
        }

        mappingInfo = ModelMappingInfo.createDefault(name, this.client.keyspace);
        this.client.log('info', `Mapping information for model '${name}' not found, creating default mapping. ` +
          `Keyspace: ${mappingInfo.keyspace}; Table: ${mappingInfo.tables[0].name}.`);
      } else {
        this.client.log('info', `Creating model mapper for '${name}' using mapping information. Keyspace: ${
          mappingInfo.keyspace}; Table${mappingInfo.tables.length > 1? 's' : ''}: ${
          mappingInfo.tables.map(t => t.name)}.`);
      }

      modelMapper = new ModelMapper(name, new MappingHandler(this.client, mappingInfo));
      this._modelMappers.set(name, modelMapper);
    }

    return modelMapper;
  }

  /**
   * Executes a batch of queries represented in the items.