n1-sql/lib/util.js

n1-sql ===

'use strict';

module.exports.setSingularState = function (state, path, value) {
  var old = state.getIn([path]);
  if (old) {
    throw '"' + path + '" already set to "' + old + '".';
  }
  return state.setIn([path], value);
};

module.exports.parseColumn = function (colId, state) {
  var cs = colId.split('.');
  if (cs.length !== 2) {
    throw 'Expected a column description of kind "table.colName", but got "' + colId + '".';
  }
  var tableName = cs[0];
  var table = state.getIn(['table2dp', tableName]);
  if (!table) {
    throw 'Undeclared table "' + tableName + '" in join "' + colId + '".';
  }
  var column = cs[1];
  var res = { table: table, column: column };
  if (tableName !== table) {
    res.tableAlias = tableName;
  }
  return res;
};

module.exports.toSqlColumn = function (colHash) {
  var t = colHash.tableAlias ? colHash.tableAlias : colHash.table;
  return t + '.' + colHash.column;
};