fireball-db/lib/utils.js

a lightweight model wrapper for DynamoDB

var isArray, isObject, ref;

ref = require('lodash'), isArray = ref.isArray, isObject = ref.isObject;

module.exports = {
  key_and_params: function(key, params) {
    var ref1;
    if (params == null) {
      params = {};
    }
    if (!isObject(params)) {
      key.push(params);
      params = {};
    }
    if (isArray(key) && key.length === 0) {
      ref1 = [params, {}], key = ref1[0], params = ref1[1];
    }
    if (params == null) {
      params = {};
    }
    return [key, params];
  },
  key_for: function(item, hash_key, range_key) {
    var hash_value, key, range_value;
    key = {};
    if (isArray(item) && item.length === 1) {
      item = item[0];
    }
    hash_value = range_value = item;
    if (isArray(item)) {
      hash_value = item[0], range_value = item[1];
    }
    if (isObject(hash_value)) {
      hash_value = hash_value[hash_key];
    }
    key[hash_key] = hash_value;
    if (range_key != null) {
      if (isObject(range_value)) {
        range_value = range_value[range_key];
      }
      key[range_key] = range_value;
    }
    return key;
  }
};