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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
import { waterfall, eachSeries } from 'async'
import fs = require('fs')
import path = require('path')
const db = require('./database')
import { LAST_MIGRATION_VERSION } from './constants'
import { logger } from '../helpers'
function migrate (finalCallback) {
waterfall([
function checkApplicationTableExists (callback) {
db.sequelize.getQueryInterface().showAllTables().asCallback(function (err, tables) {
if (err) return callback(err)
// No tables, we don't need to migrate anything
// The installer will do that
if (tables.length === 0) return finalCallback(null)
return callback(null)
})
},
function loadMigrationVersion (callback) {
db.Application.loadMigrationVersion(callback)
},
function createMigrationRowIfNotExists (actualVersion, callback) {
if (actualVersion === null) {
db.Application.create({
migrationVersion: 0
}, function (err) {
return callback(err, 0)
})
}
return callback(null, actualVersion)
},
function abortMigrationIfNotNeeded (actualVersion, callback) {
// No need migrations
if (actualVersion >= LAST_MIGRATION_VERSION) return finalCallback(null)
return callback(null, actualVersion)
},
function getMigrations (actualVersion, callback) {
// If there are a new migration scripts
logger.info('Begin migrations.')
getMigrationScripts(function (err, migrationScripts) {
return callback(err, actualVersion, migrationScripts)
})
},
function doMigrations (actualVersion, migrationScripts, callback) {
eachSeries(migrationScripts, function (entity, callbackEach) {
executeMigration(actualVersion, entity, callbackEach)
}, function (err) {
if (err) return callback(err)
logger.info('Migrations finished. New migration version schema: %s', LAST_MIGRATION_VERSION)
return callback(null)
})
}
], finalCallback)
}
// ---------------------------------------------------------------------------
export {
migrate
}
// ---------------------------------------------------------------------------
function getMigrationScripts (callback) {
fs.readdir(path.join(__dirname, 'migrations'), function (err, files) {
if (err) return callback(err)
const filesToMigrate = []
files.forEach(function (file) {
// Filename is something like 'version-blabla.js'
const version = file.split('-')[0]
filesToMigrate.push({
version,
script: file
})
})
return callback(err, filesToMigrate)
})
}
function executeMigration (actualVersion, entity, callback) {
const versionScript = parseInt(entity.version)
// Do not execute old migration scripts
if (versionScript <= actualVersion) return callback(null)
// Load the migration module and run it
const migrationScriptName = entity.script
logger.info('Executing %s migration script.', migrationScriptName)
const migrationScript = require(path.join(__dirname, 'migrations', migrationScriptName))
db.sequelize.transaction().asCallback(function (err, t) {
if (err) return callback(err)
const options = {
transaction: t,
queryInterface: db.sequelize.getQueryInterface(),
sequelize: db.sequelize,
Sequelize: db.Sequelize
}
migrationScript.up(options, function (err) {
if (err) {
t.rollback()
return callback(err)
}
// Update the new migration version
db.Application.updateMigrationVersion(versionScript, t, function (err) {
if (err) {
t.rollback()
return callback(err)
}
t.commit().asCallback(callback)
})
})
})
}
|
