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refactor : move prepare methods to from api to sql class

pull/13/head
oof1lab 7 years ago
parent
85346e0b2e
commit
a29e82787b
2 changed files with 269 additions and 280 deletions
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  1. 274
      lib/xapi.js
  2. 275
      lib/xsql.js

274
lib/xapi.js
Unescape View File

@ -283,275 +283,13 @@ class Xapi {
}
_getGrpByHavingOrderBy(req, tableName, queryParamsObj, listType) {
/**************** add group by ****************/
this.mysql.getGroupByClause(req.query._groupby, req.app.locals._tableName, queryParamsObj);
/**************** add having ****************/
this.mysql.getHavingClause(req.query._having, req.app.locals._tableName, queryParamsObj);
/**************** add order clause ****************/
this.mysql.getOrderByClause(req.query, req.app.locals._tableName, queryParamsObj);
/**************** add limit clause ****************/
if (listType === 2) { //nested
queryParamsObj.query += ' limit 1 '
} else {
queryParamsObj.query += ' limit ?,? '
queryParamsObj.params = queryParamsObj.params.concat(this.mysql.getLimitClause(req.query));
}
}
/**
*
* @param req
* @param res
* @param queryParamsObj : {query, params}
* @param listType : 0:list, 1:nested, 2:findOne, 3:bulkRead, 4:distinct, 5:xjoin
*
* Updates query, params for query of type listType
*/
prepareListQuery(req, res, queryParamsObj, listType = 0) {
queryParamsObj.query = 'select ';
queryParamsObj.params = [];
if (listType === 4) { //list type distinct
queryParamsObj.query += ' distinct '
}
/**************** select columns ****************/
if (req.query._groupby) {
this.mysql.getColumnsForSelectStmtWithGrpBy(req.query, req.app.locals._tableName, queryParamsObj);
} else {
this.mysql.getColumnsForSelectStmt(req.app.locals._tableName, req.query, queryParamsObj);
}
/**************** add tableName ****************/
queryParamsObj.query += ' from ?? ';
if (listType === 1) { //nested list
req.app.locals._tableName = req.app.locals._childTable;
queryParamsObj.params.push(req.app.locals._childTable);
queryParamsObj.query += ' where ';
/**************** add where foreign key ****************/
let whereClause = this.mysql.getForeignKeyWhereClause(req.app.locals._parentTable,
req.params.id,
req.app.locals._childTable);
if (!whereClause) {
return res.status(400).send({
error: "Table is made of composite primary keys - all keys were not in input"
})
}
queryParamsObj.query += whereClause;
this.mysql.getWhereClause(req.query._where, req.app.locals._tableName, queryParamsObj, ' and ');
} else if (listType === 3) { //bulkRead
// select * from table where pk in (ids) and whereConditions
queryParamsObj.params.push(req.app.locals._tableName);
queryParamsObj.query += ' where ?? in ';
queryParamsObj.params.push(this.mysql.getPrimaryKeyName(req.app.locals._tableName));
queryParamsObj.query += '('
if (req.query && req.query._ids) {
let ids = req.query._ids.split(',')
for (var i = 0; i < ids.length; ++i) {
if (i) {
queryParamsObj.query += ','
}
queryParamsObj.query += '?'
queryParamsObj.params.push(ids[i])
}
}
queryParamsObj.query += ') '
this.mysql.getWhereClause(req.query._where, req.app.locals._tableName, queryParamsObj, ' and ');
} else {
queryParamsObj.params.push(req.app.locals._tableName);
/**************** add where clause ****************/
this.mysql.getWhereClause(req.query._where, req.app.locals._tableName, queryParamsObj, ' where ');
}
this._getGrpByHavingOrderBy(req, req.app.locals._tableName, queryParamsObj)
//console.log(queryParamsObj.query, queryParamsObj.params);
}
_joinTableNames(isSecondJoin, joinTables, index, queryParamsObj) {
if (isSecondJoin) {
/**
* in second join - there will be ONE table and an ON condition
* this if clause deals with this
*
*/
// add : join / left join / right join / full join / inner join
queryParamsObj.query += this.mysql.getJoinType(joinTables[index])
queryParamsObj.query += ' ?? as ?? '
// eg: tbl.tableName
let tableNameAndAs = joinTables[index + 1].split('.')
if (tableNameAndAs.length === 2 && !(tableNameAndAs[1] in this.config.ignoreTables)) {
queryParamsObj.params.push(tableNameAndAs[1])
queryParamsObj.params.push(tableNameAndAs[0])
} else {
queryParamsObj.grammarErr = 1
console.log('there was no dot for tableName ', joinTables[index + 1]);
}
} else {
/**
* in first join - there will be TWO tables and an ON condition
* this else clause deals with this
*/
// first table
queryParamsObj.query += ' ?? as ?? '
// add : join / left join / right join / full join / inner join
queryParamsObj.query += this.mysql.getJoinType(joinTables[index + 1])
// second table
queryParamsObj.query += ' ?? as ?? '
let tableNameAndAs = joinTables[index].split('.')
if (tableNameAndAs.length === 2 && !(tableNameAndAs[1] in this.config.ignoreTables)) {
queryParamsObj.params.push(tableNameAndAs[1])
queryParamsObj.params.push(tableNameAndAs[0])
} else {
queryParamsObj.grammarErr = 1
console.log('there was no dot for tableName ', joinTables[index]);
}
tableNameAndAs = []
tableNameAndAs = joinTables[index + 2].split('.')
if (tableNameAndAs.length === 2 && !(tableNameAndAs[1] in this.config.ignoreTables)) {
queryParamsObj.params.push(tableNameAndAs[1])
queryParamsObj.params.push(tableNameAndAs[0])
} else {
queryParamsObj.grammarErr = 1
console.log('there was no dot for tableName ', joinTables[index]);
}
}
}
prepareJoinQuery(req, res, queryParamsObj) {
queryParamsObj.query = 'SELECT '
queryParamsObj.grammarErr = 0;
/**************** START : get fields ****************/
if (req.query._fields) {
let fields = req.query._fields.split(',')
// from _fields to - ??, ??, ?? [col1,col2,col3]
for (var i = 0; i < fields.length; ++i) {
if (i) {
queryParamsObj.query += ','
}
queryParamsObj.query += ' ?? '
queryParamsObj.params.push(fields[i])
}
} else {
queryParamsObj.query += ' * '
}
queryParamsObj.query += ' from '
/**************** END : get fields ****************/
/**************** START : get join + on ****************/
let joinTables = req.query._join.split(',')
if (joinTables.length < 3) {
//console.log('grammar error ', joinTables.length);
queryParamsObj.grammarErr = 1;
}
//console.log('jointables.length', joinTables);
let onCondnCount = 0;
for (let i = 0; i < joinTables.length - 1 && queryParamsObj.grammarErr === 0; i = i + 2) {
onCondnCount++;
this._joinTableNames(i, joinTables, i, queryParamsObj)
if (queryParamsObj.grammarErr) {
console.log('failed at _joinTableNames', queryParamsObj);
break;
}
//console.log('after join tables', queryParamsObj);
let onCondn = '_on' + (onCondnCount)
let onCondnObj = {}
if (onCondn in req.query) {
//console.log(onCondn, req.query[onCondn]);
onCondnObj = whrHelp.getConditionClause(req.query[onCondn], ' on ')
//console.log('onCondnObj', onCondnObj);
queryParamsObj.query += ' on ' + onCondnObj.query
queryParamsObj.params = queryParamsObj.params.concat(onCondnObj.params)
} else {
queryParamsObj.grammarErr = 1;
//console.log('No on condition: ', onCondn);
break;
}
//console.log('- - - - - - -');
if (i === 0) {
i = i + 1
}
//console.log('index after loop', i);
}
/**************** END : get join + on ****************/
if (queryParamsObj.grammarErr) {
queryParamsObj.query = ''
queryParamsObj.params = []
}
this.mysql.getWhereClause(req.query._where, ' ignore ', queryParamsObj, ' where ');
//console.log('after where',queryParamsObj);
this._getGrpByHavingOrderBy(req, 'ignore', queryParamsObj, 5)
return queryParamsObj;
}
async list(req, res) {
let queryParamsObj = {}
queryParamsObj.query = ''
queryParamsObj.params = []
this.prepareListQuery(req, res, queryParamsObj, 0);
this.mysql.prepareListQuery(req, res, queryParamsObj, 0);
let results = await this.mysql.exec(queryParamsObj.query, queryParamsObj.params);
res.status(200).json(results);
@ -566,7 +304,7 @@ class Xapi {
obj.query = '';
obj.params = [];
this.prepareJoinQuery(req, res, obj)
this.mysql.prepareJoinQuery(req, res, obj)
//console.log(obj);
@ -583,7 +321,7 @@ class Xapi {
queryParamsObj.query = ''
queryParamsObj.params = []
this.prepareListQuery(req, res, queryParamsObj, 4);
this.mysql.prepareListQuery(req, res, queryParamsObj, 4);
let results = await this.mysql.exec(queryParamsObj.query, queryParamsObj.params);
res.status(200).json(results);
@ -596,7 +334,7 @@ class Xapi {
queryParamsObj.query = '';
queryParamsObj.params = [];
this.prepareListQuery(req, res, queryParamsObj, 1)
this.mysql.prepareListQuery(req, res, queryParamsObj, 1)
let results = await this.mysql.exec(queryParamsObj.query, queryParamsObj.params);
res.status(200).json(results);
@ -609,7 +347,7 @@ class Xapi {
queryParamsObj.query = ''
queryParamsObj.params = []
this.prepareListQuery(req, res, queryParamsObj, 2);
this.mysql.prepareListQuery(req, res, queryParamsObj, 2);
let results = await this.mysql.exec(queryParamsObj.query, queryParamsObj.params);
res.status(200).json(results);
@ -794,7 +532,7 @@ class Xapi {
queryParamsObj.query = ''
queryParamsObj.params = []
this.prepareListQuery(req, res, queryParamsObj, 3);
this.mysql.prepareListQuery(req, res, queryParamsObj, 3);
//console.log(queryParamsObj.query, queryParamsObj.params);

275
lib/xsql.js
Unescape View File

@ -635,18 +635,6 @@ class Xsql {
}
getJoinTables(req) {
}
getJoinOnConditions() {
}
getJoinQuery() {
}
globalRoutesPrint(apiPrefix) {
@ -746,6 +734,269 @@ class Xsql {
}
_getGrpByHavingOrderBy(req, tableName, queryParamsObj, listType) {
/**************** add group by ****************/
this.getGroupByClause(req.query._groupby, req.app.locals._tableName, queryParamsObj);
/**************** add having ****************/
this.getHavingClause(req.query._having, req.app.locals._tableName, queryParamsObj);
/**************** add order clause ****************/
this.getOrderByClause(req.query, req.app.locals._tableName, queryParamsObj);
/**************** add limit clause ****************/
if (listType === 2) { //nested
queryParamsObj.query += ' limit 1 '
} else {
queryParamsObj.query += ' limit ?,? '
queryParamsObj.params = queryParamsObj.params.concat(this.getLimitClause(req.query));
}
}
/**
*
* @param req
* @param res
* @param queryParamsObj : {query, params}
* @param listType : 0:list, 1:nested, 2:findOne, 3:bulkRead, 4:distinct, 5:xjoin
*
* Updates query, params for query of type listType
*/
prepareListQuery(req, res, queryParamsObj, listType = 0) {
queryParamsObj.query = 'select ';
queryParamsObj.params = [];
if (listType === 4) { //list type distinct
queryParamsObj.query += ' distinct '
}
/**************** select columns ****************/
if (req.query._groupby) {
this.getColumnsForSelectStmtWithGrpBy(req.query, req.app.locals._tableName, queryParamsObj);
} else {
this.getColumnsForSelectStmt(req.app.locals._tableName, req.query, queryParamsObj);
}
/**************** add tableName ****************/
queryParamsObj.query += ' from ?? ';
if (listType === 1) { //nested list
req.app.locals._tableName = req.app.locals._childTable;
queryParamsObj.params.push(req.app.locals._childTable);
queryParamsObj.query += ' where ';
/**************** add where foreign key ****************/
let whereClause = this.getForeignKeyWhereClause(req.app.locals._parentTable,
req.params.id,
req.app.locals._childTable);
if (!whereClause) {
return res.status(400).send({
error: "Table is made of composite primary keys - all keys were not in input"
})
}
queryParamsObj.query += whereClause;
this.getWhereClause(req.query._where, req.app.locals._tableName, queryParamsObj, ' and ');
} else if (listType === 3) { //bulkRead
// select * from table where pk in (ids) and whereConditions
queryParamsObj.params.push(req.app.locals._tableName);
queryParamsObj.query += ' where ?? in ';
queryParamsObj.params.push(this.getPrimaryKeyName(req.app.locals._tableName));
queryParamsObj.query += '('
if (req.query && req.query._ids) {
let ids = req.query._ids.split(',')
for (var i = 0; i < ids.length; ++i) {
if (i) {
queryParamsObj.query += ','
}
queryParamsObj.query += '?'
queryParamsObj.params.push(ids[i])
}
}
queryParamsObj.query += ') '
this.getWhereClause(req.query._where, req.app.locals._tableName, queryParamsObj, ' and ');
} else {
queryParamsObj.params.push(req.app.locals._tableName);
/**************** add where clause ****************/
this.getWhereClause(req.query._where, req.app.locals._tableName, queryParamsObj, ' where ');
}
this._getGrpByHavingOrderBy(req, req.app.locals._tableName, queryParamsObj)
//console.log(queryParamsObj.query, queryParamsObj.params);
}
_joinTableNames(isSecondJoin, joinTables, index, queryParamsObj) {
if (isSecondJoin) {
/**
* in second join - there will be ONE table and an ON condition
* this if clause deals with this
*
*/
// add : join / left join / right join / full join / inner join
queryParamsObj.query += this.getJoinType(joinTables[index])
queryParamsObj.query += ' ?? as ?? '
// eg: tbl.tableName
let tableNameAndAs = joinTables[index + 1].split('.')
if (tableNameAndAs.length === 2 && !(tableNameAndAs[1] in this.sqlConfig.ignoreTables)) {
queryParamsObj.params.push(tableNameAndAs[1])
queryParamsObj.params.push(tableNameAndAs[0])
} else {
queryParamsObj.grammarErr = 1
console.log('there was no dot for tableName ', joinTables[index + 1]);
}
} else {
/**
* in first join - there will be TWO tables and an ON condition
* this else clause deals with this
*/
// first table
queryParamsObj.query += ' ?? as ?? '
// add : join / left join / right join / full join / inner join
queryParamsObj.query += this.getJoinType(joinTables[index + 1])
// second table
queryParamsObj.query += ' ?? as ?? '
let tableNameAndAs = joinTables[index].split('.')
if (tableNameAndAs.length === 2 && !(tableNameAndAs[1] in this.sqlConfig.ignoreTables)) {
queryParamsObj.params.push(tableNameAndAs[1])
queryParamsObj.params.push(tableNameAndAs[0])
} else {
queryParamsObj.grammarErr = 1
console.log('there was no dot for tableName ', joinTables[index]);
}
tableNameAndAs = []
tableNameAndAs = joinTables[index + 2].split('.')
if (tableNameAndAs.length === 2 && !(tableNameAndAs[1] in this.sqlConfig.ignoreTables)) {
queryParamsObj.params.push(tableNameAndAs[1])
queryParamsObj.params.push(tableNameAndAs[0])
} else {
queryParamsObj.grammarErr = 1
console.log('there was no dot for tableName ', joinTables[index]);
}
}
}
prepareJoinQuery(req, res, queryParamsObj) {
queryParamsObj.query = 'SELECT '
queryParamsObj.grammarErr = 0;
/**************** START : get fields ****************/
if (req.query._fields) {
let fields = req.query._fields.split(',')
// from _fields to - ??, ??, ?? [col1,col2,col3]
for (var i = 0; i < fields.length; ++i) {
if (i) {
queryParamsObj.query += ','
}
queryParamsObj.query += ' ?? '
queryParamsObj.params.push(fields[i])
}
} else {
queryParamsObj.query += ' * '
}
queryParamsObj.query += ' from '
/**************** END : get fields ****************/
/**************** START : get join + on ****************/
let joinTables = req.query._join.split(',')
if (joinTables.length < 3) {
//console.log('grammar error ', joinTables.length);
queryParamsObj.grammarErr = 1;
}
//console.log('jointables.length', joinTables);
let onCondnCount = 0;
for (let i = 0; i < joinTables.length - 1 && queryParamsObj.grammarErr === 0; i = i + 2) {
onCondnCount++;
this._joinTableNames(i, joinTables, i, queryParamsObj)
if (queryParamsObj.grammarErr) {
console.log('failed at _joinTableNames', queryParamsObj);
break;
}
//console.log('after join tables', queryParamsObj);
let onCondn = '_on' + (onCondnCount)
let onCondnObj = {}
if (onCondn in req.query) {
//console.log(onCondn, req.query[onCondn]);
onCondnObj = whereHelp.getConditionClause(req.query[onCondn], ' on ')
//console.log('onCondnObj', onCondnObj);
queryParamsObj.query += ' on ' + onCondnObj.query
queryParamsObj.params = queryParamsObj.params.concat(onCondnObj.params)
} else {
queryParamsObj.grammarErr = 1;
//console.log('No on condition: ', onCondn);
break;
}
//console.log('- - - - - - -');
if (i === 0) {
i = i + 1
}
//console.log('index after loop', i);
}
/**************** END : get join + on ****************/
if (queryParamsObj.grammarErr) {
queryParamsObj.query = ''
queryParamsObj.params = []
}
this.getWhereClause(req.query._where, ' ignore ', queryParamsObj, ' where ');
//console.log('after where',queryParamsObj);
this._getGrpByHavingOrderBy(req, 'ignore', queryParamsObj, 5)
return queryParamsObj;
}
}

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