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https://github.com/nocodb/nocodb.git
synced 2026-05-01 05:26:53 +00:00
Feature : xjoin API 🔥 🔥
npm v0.4.0
This commit is contained in:
oof1lab
233
lib/xapi.js
233
lib/xapi.js
@@ -1,10 +1,12 @@
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'use strict';
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var Xsql = require('./xsql.js');
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var whrHelp = require('./util/whereClause.helper.js');
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var multer = require('multer');
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var path = require('path');
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const colors = require('colors');
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//define class
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class Xapi {
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@@ -110,6 +112,11 @@ class Xapi {
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this.app.route('/api/tables')
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.get(this.asyncMiddleware(this.tables.bind(this)));
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this.app.route('/api/xjoin')
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.get(this.asyncMiddleware(this.xjoin.bind(this)));
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stat.api += 3;
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/**************** START : setup routes for each table ****************/
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let resources = [];
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@@ -276,12 +283,34 @@ class Xapi {
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}
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_getGrpByHavingOrderBy(req, tableName, queryParamsObj, listType) {
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/**************** add group by ****************/
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this.mysql.getGroupByClause(req.query._groupby, req.app.locals._tableName, queryParamsObj);
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/**************** add having ****************/
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this.mysql.getHavingClause(req.query._having, req.app.locals._tableName, queryParamsObj);
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/**************** add order clause ****************/
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this.mysql.getOrderByClause(req.query, req.app.locals._tableName, queryParamsObj);
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/**************** add limit clause ****************/
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if (listType === 2) { //nested
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queryParamsObj.query += ' limit 1 '
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} else {
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queryParamsObj.query += ' limit ?,? '
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queryParamsObj.params = queryParamsObj.params.concat(this.mysql.getLimitClause(req.query));
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}
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}
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/**
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*
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* @param req
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* @param res
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* @param queryParamsObj : {query, params}
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* @param listType : 0:list, 1:nested, 2:findOne, 3:bulkRead, 4:distinct
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* @param listType : 0:list, 1:nested, 2:findOne, 3:bulkRead, 4:distinct, 5:xjoin
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*
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* Updates query, params for query of type listType
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*/
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@@ -304,7 +333,7 @@ class Xapi {
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/**************** add tableName ****************/
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queryParamsObj.query += ' from ?? ';
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if (listType === 1) {
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if (listType === 1) { //nested list
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req.app.locals._tableName = req.app.locals._childTable;
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@@ -357,27 +386,165 @@ class Xapi {
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}
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/**************** add group by ****************/
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this.mysql.getGroupByClause(req.query._groupby, req.app.locals._tableName, queryParamsObj);
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this._getGrpByHavingOrderBy(req, req.app.locals._tableName, queryParamsObj)
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/**************** add having ****************/
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this.mysql.getHavingClause(req.query._having, req.app.locals._tableName, queryParamsObj);
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/**************** add order clause ****************/
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this.mysql.getOrderByClause(req.query, req.app.locals._tableName, queryParamsObj);
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/**************** add limit clause ****************/
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if (listType === 2) {
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queryParamsObj.query += ' limit 1 '
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} else {
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queryParamsObj.query += ' limit ?,? '
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queryParamsObj.params = queryParamsObj.params.concat(this.mysql.getLimitClause(req.query));
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}
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//console.log(queryParamsObj.query, queryParamsObj.params);
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}
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_joinTableNames(isSecondJoin, joinTables, index, queryParamsObj) {
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if (isSecondJoin) {
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/**
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* in second join - there will be ONE table and an ON condition
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* this if clause deals with this
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*
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*/
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// add : join / left join / right join / full join / inner join
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queryParamsObj.query += this.mysql.getJoinType(joinTables[index])
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queryParamsObj.query += ' ?? as ?? '
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// eg: tbl.tableName
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let tableNameAndAs = joinTables[index + 1].split('.')
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if (tableNameAndAs.length === 2) {
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queryParamsObj.params.push(tableNameAndAs[1])
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queryParamsObj.params.push(tableNameAndAs[0])
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} else {
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queryParamsObj.grammarErr = 1
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console.log('there was no dot for tableName ', joinTables[index + 1]);
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}
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} else {
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/**
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* in first join - there will be TWO tables and an ON condition
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* this else clause deals with this
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*/
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// first table
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queryParamsObj.query += ' ?? as ?? '
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// add : join / left join / right join / full join / inner join
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queryParamsObj.query += this.mysql.getJoinType(joinTables[index + 1])
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// second table
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queryParamsObj.query += ' ?? as ?? '
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let tableNameAndAs = joinTables[index].split('.')
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if (tableNameAndAs.length === 2) {
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queryParamsObj.params.push(tableNameAndAs[1])
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queryParamsObj.params.push(tableNameAndAs[0])
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} else {
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queryParamsObj.grammarErr = 1
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console.log('there was no dot for tableName ', joinTables[index]);
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}
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tableNameAndAs = []
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tableNameAndAs = joinTables[index + 2].split('.')
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if (tableNameAndAs.length === 2) {
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queryParamsObj.params.push(tableNameAndAs[1])
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queryParamsObj.params.push(tableNameAndAs[0])
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} else {
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queryParamsObj.grammarErr = 1
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console.log('there was no dot for tableName ', joinTables[index]);
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}
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}
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}
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prepareJoinQuery(req, res, queryParamsObj) {
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queryParamsObj.query = 'SELECT '
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queryParamsObj.grammarErr = 0;
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/**************** START : get fields ****************/
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if (req.query._fields) {
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let fields = req.query._fields.split(',')
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// from _fields to - ??, ??, ?? [col1,col2,col3]
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for (var i = 0; i < fields.length; ++i) {
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if (i) {
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queryParamsObj.query += ','
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}
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queryParamsObj.query += ' ?? '
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queryParamsObj.params.push(fields[i])
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}
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} else {
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queryParamsObj.query += ' * '
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}
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queryParamsObj.query += ' from '
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/**************** END : get fields ****************/
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/**************** START : get join + on ****************/
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let joinTables = req.query._join.split(',')
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if (joinTables.length < 3) {
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//console.log('grammar error ', joinTables.length);
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queryParamsObj.grammarErr = 1;
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}
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//console.log('jointables.length', joinTables);
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let onCondnCount = 0;
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for (let i = 0; i < joinTables.length - 1 && queryParamsObj.grammarErr === 0; i = i + 2) {
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onCondnCount++;
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this._joinTableNames(i, joinTables, i, queryParamsObj)
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if (queryParamsObj.grammarErr) {
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console.log('failed at _joinTableNames', queryParamsObj);
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break;
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}
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//console.log('after join tables', queryParamsObj);
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let onCondn = '_on' + (onCondnCount)
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let onCondnObj = {}
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if (onCondn in req.query) {
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//console.log(onCondn, req.query[onCondn]);
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onCondnObj = whrHelp.getConditionClause(req.query[onCondn], ' on ')
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//console.log('onCondnObj', onCondnObj);
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queryParamsObj.query += ' on ' + onCondnObj.query
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queryParamsObj.params = queryParamsObj.params.concat(onCondnObj.params)
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} else {
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queryParamsObj.grammarErr = 1;
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//console.log('No on condition: ', onCondn);
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break;
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}
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//console.log('- - - - - - -');
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if (i === 0) {
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i = i + 1
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}
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//console.log('index after loop', i);
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}
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/**************** END : get join + on ****************/
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if (queryParamsObj.grammarErr) {
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queryParamsObj.query = ''
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queryParamsObj.params = []
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}
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this.mysql.getWhereClause(req.query._where, ' ignore ', queryParamsObj, ' where ');
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//console.log('after where',queryParamsObj);
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this._getGrpByHavingOrderBy(req, 'ignore', queryParamsObj, 5)
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return queryParamsObj;
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}
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async list(req, res) {
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let queryParamsObj = {}
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@@ -391,6 +558,25 @@ class Xapi {
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}
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async xjoin(req, res) {
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let obj = {}
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obj.query = '';
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obj.params = [];
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this.prepareJoinQuery(req, res, obj)
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//console.log(obj);
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let results = await this.mysql.exec(obj.query, obj.params)
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res.status(200).json(results)
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//http://localhost:3000/api/xjoin?_join=pl.productlines,j,pr.products,j,ord.orderdetails&on1=(pl.productline,eq,pr.products)&on2=(pr.productcode,eq,ord.productcode)
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}
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async distinct(req, res) {
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let queryParamsObj = {}
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@@ -628,19 +814,24 @@ class Xapi {
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let results = await this.mysql.exec(query, params);
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res.status(200).json(results);
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}
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async tables(req, res) {
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let query = 'show tables';
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let params = [];
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let query = 'SELECT table_name AS resource FROM information_schema.tables WHERE table_schema = ? ';
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let params = [this.config.database];
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if (Object.keys(this.config.ignoreTables).length > 0) {
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query += 'and table_name not in (?)'
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params.push(Object.keys(this.config.ignoreTables))
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}
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let results = await this.mysql.exec(query, params)
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res.status(200).json(results)
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res.status(200).json(results)
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}
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async runQuery(req, res) {
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let query = req.body.query;
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