tg-knex-query-resolver/convert-simple-filter.js

TeselaGen's Knex based query resolver

const _ = require("lodash");

module.exports = function convertSimpleFilterToFilterQuery(
  modelName,
  simpleFilter
) {
  if (typeof simpleFilter !== "object")
    throw new Error("Expected Simple Query to be object");
  if (simpleFilter.__objectType === "query") return simpleFilter;

  var filterQuery = {
    type: "group",
    operator: "and",
    filters: []
  };

  var whereArgs = {};

  _.each(simpleFilter, (filterArgs, attrName) => {
    if (filterArgs && filterArgs.type === 'expression') {
      filterArgs.field = attrName
        filterQuery.filters.push(filterArgs);
    }
    else if (Array.isArray(filterArgs)) {
      filterQuery.filters.push({
        type: "expression",
        operator: "inList",
        field: attrName,
        args: [filterArgs]
      });
    } else {
      whereArgs[attrName] = filterArgs;
    }
  });

  if (Object.keys(whereArgs).length > 0) {
    filterQuery.filters.push({
      type: "where",
      args: whereArgs
    });
  }

  var query = {
    __objectType: "query",
    entity: modelName,
    type: "root",
    filters: [filterQuery]
  };

  return query;
};