lib/dialects/postgres/query-interface.js
'use strict';
const DataTypes = require('../../data-types');
const Promise = require('../../promise');
const QueryTypes = require('../../query-types');
const _ = require('lodash');
/**
Returns an object that handles Postgres special needs to do certain queries.
@class QueryInterface
@static
@private
*/
/**
* Ensure enum and their values.
*
* @param {QueryInterface} qi
* @param {string} tableName Name of table to create
* @param {Object} attributes Object representing a list of normalized table attributes
* @param {Object} [options]
* @param {Model} [model]
*
* @returns {Promise}
* @private
*/
function ensureEnums(qi, tableName, attributes, options, model) {
const keys = Object.keys(attributes);
const keyLen = keys.length;
let sql = '';
let promises = [];
let i = 0;
for (i = 0; i < keyLen; i++) {
const attribute = attributes[keys[i]];
const type = attribute.type;
if (
type instanceof DataTypes.ENUM ||
type instanceof DataTypes.ARRAY && type.type instanceof DataTypes.ENUM //ARRAY sub type is ENUM
) {
sql = qi.QueryGenerator.pgListEnums(tableName, attribute.field || keys[i], options);
promises.push(qi.sequelize.query(
sql,
Object.assign({}, options, { plain: true, raw: true, type: QueryTypes.SELECT })
));
}
}
return Promise.all(promises).then(results => {
promises = [];
let enumIdx = 0;
for (i = 0; i < keyLen; i++) {
const attribute = attributes[keys[i]];
const type = attribute.type;
const enumType = type.type || type;
if (
type instanceof DataTypes.ENUM ||
type instanceof DataTypes.ARRAY && enumType instanceof DataTypes.ENUM //ARRAY sub type is ENUM
) {
// If the enum type doesn't exist then create it
if (!results[enumIdx]) {
sql = qi.QueryGenerator.pgEnum(tableName, attribute.field || keys[i], enumType, options);
promises.push(qi.sequelize.query(
sql,
Object.assign({}, options, { raw: true })
));
} else if (!!results[enumIdx] && !!model) {
const enumVals = qi.QueryGenerator.fromArray(results[enumIdx].enum_value);
const vals = enumType.values;
vals.forEach((value, idx) => {
// reset out after/before options since it's for every enum value
const valueOptions = _.clone(options);
valueOptions.before = null;
valueOptions.after = null;
if (!enumVals.includes(value)) {
if (vals[idx + 1]) {
valueOptions.before = vals[idx + 1];
}
else if (vals[idx - 1]) {
valueOptions.after = vals[idx - 1];
}
valueOptions.supportsSearchPath = false;
promises.push(qi.sequelize.query(qi.QueryGenerator.pgEnumAdd(tableName, attribute.field || keys[i], value, valueOptions), valueOptions));
}
});
enumIdx++;
}
}
}
return Promise.all(promises)
.tap(() => {
// If ENUM processed, then refresh OIDs
if (promises.length) {
return qi.sequelize.dialect.connectionManager._refreshDynamicOIDs();
}
});
});
}
exports.ensureEnums = ensureEnums;