query-interface.js
3.86 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
'use strict';
const Utils = require('../../utils');
const Promise = require('../../promise');
/**
Returns an object that treats SQLite's inabilities to do certain queries.
@class QueryInterface
@static
@private
*/
/**
A wrapper that fixes SQLite's inability to remove columns from existing tables.
It will create a backup of the table, drop the table afterwards and create a
new table with the same name but without the obsolete column.
@method removeColumn
@for QueryInterface
@param {String} tableName The name of the table.
@param {String} attributeName The name of the attribute that we want to remove.
@param {Object} options
@param {Boolean|Function} [options.logging] A function that logs the sql queries, or false for explicitly not logging these queries
@since 1.6.0
@private
*/
function removeColumn(tableName, attributeName, options) {
options = options || {};
/* jshint validthis:true */
return this.describeTable(tableName, options).then(fields => {
delete fields[attributeName];
const sql = this.QueryGenerator.removeColumnQuery(tableName, fields);
const subQueries = sql.split(';').filter(q => q !== '');
return Promise.each(subQueries, subQuery => this.sequelize.query(subQuery + ';', Utils._.assign({raw: true}, options)));
});
}
exports.removeColumn = removeColumn;
/**
A wrapper that fixes SQLite's inability to change columns from existing tables.
It will create a backup of the table, drop the table afterwards and create a
new table with the same name but with a modified version of the respective column.
@method changeColumn
@for QueryInterface
@param {String} tableName The name of the table.
@param {Object} attributes An object with the attribute's name as key and it's options as value object.
@param {Object} options
@param {Boolean|Function} [options.logging] A function that logs the sql queries, or false for explicitly not logging these queries
@since 1.6.0
@private
*/
function changeColumn(tableName, attributes, options) {
const attributeName = Object.keys(attributes)[0];
options = options || {};
/* jshint validthis:true */
return this.describeTable(tableName, options).then(fields => {
fields[attributeName] = attributes[attributeName];
const sql = this.QueryGenerator.removeColumnQuery(tableName, fields);
const subQueries = sql.split(';').filter(q => q !== '');
return Promise.each(subQueries, subQuery => this.sequelize.query(subQuery + ';', Utils._.assign({raw: true}, options)));
});
}
exports.changeColumn = changeColumn;
/**
A wrapper that fixes SQLite's inability to rename columns from existing tables.
It will create a backup of the table, drop the table afterwards and create a
new table with the same name but with a renamed version of the respective column.
@method renameColumn
@for QueryInterface
@param {String} tableName The name of the table.
@param {String} attrNameBefore The name of the attribute before it was renamed.
@param {String} attrNameAfter The name of the attribute after it was renamed.
@param {Object} options
@param {Boolean|Function} [options.logging] A function that logs the sql queries, or false for explicitly not logging these queries
@since 1.6.0
@private
*/
function renameColumn(tableName, attrNameBefore, attrNameAfter, options) {
options = options || {};
/* jshint validthis:true */
return this.describeTable(tableName, options).then(fields => {
fields[attrNameAfter] = Utils._.clone(fields[attrNameBefore]);
delete fields[attrNameBefore];
const sql = this.QueryGenerator.renameColumnQuery(tableName, attrNameBefore, attrNameAfter, fields);
const subQueries = sql.split(';').filter(q => q !== '');
return Promise.each(subQueries, subQuery => this.sequelize.query(subQuery + ';', Utils._.assign({raw: true}, options)));
});
}
exports.renameColumn = renameColumn;