Skip to content
Navigation Menu
{{ message }}
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathMigration.php
More file actions
446 lines (378 loc) · 11.4 KB
/
Copy pathMigration.php
File metadata and controls
446 lines (378 loc) · 11.4 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
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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP
*
* This content is released under the MIT License (MIT)
*
* Copyright (c) 2014 - 2015, British Columbia Institute of Technology
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @package CodeIgniter
* @author EllisLab Dev Team
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
* @copyright Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
* @license http://opensource.org/licenses/MIT MIT License
* @link http://codeigniter.com
* @since Version 3.0.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');
/**
* Migration Class
*
* All migrations should implement this, forces up() and down() and gives
* access to the CI super-global.
*
* @package CodeIgniter
* @subpackage Libraries
* @category Libraries
* @author Reactor Engineers
* @link
*/
class CI_Migration {
/**
* Whether the library is enabled
*
* @var bool
*/
protected $_migration_enabled = FALSE;
/**
* Migration numbering type
*
* @var bool
*/
protected $_migration_type = 'sequential';
/**
* Path to migration classes
*
* @var string
*/
protected $_migration_path = NULL;
/**
* Current migration version
*
* @var mixed
*/
protected $_migration_version = 0;
/**
* Database table with migration info
*
* @var string
*/
protected $_migration_table = 'migrations';
/**
* Whether to automatically run migrations
*
* @var bool
*/
protected $_migration_auto_latest = FALSE;
/**
* Migration basename regex
*
* @var bool
*/
protected $_migration_regex = NULL;
/**
* Error message
*
* @var string
*/
protected $_error_string = '';
/**
* Initialize Migration Class
*
* @param array $config
* @return void
*/
public function __construct($config = array())
{
// Only run this constructor on main library load
if ( ! in_array(get_class($this), array('CI_Migration', config_item('subclass_prefix').'Migration'), TRUE))
{
return;
}
foreach ($config as $key => $val)
{
$this->{'_'.$key} = $val;
}
log_message('info', 'Migrations Class Initialized');
// Are they trying to use migrations while it is disabled?
if ($this->_migration_enabled !== TRUE)
{
show_error('Migrations has been loaded but is disabled or set up incorrectly.');
}
// If not set, set it
$this->_migration_path !== '' OR $this->_migration_path = APPPATH.'migrations/';
// Add trailing slash if not set
$this->_migration_path = rtrim($this->_migration_path, '/').'/';
// Load migration language
$this->lang->load('migration');
// They'll probably be using dbforge
$this->load->dbforge();
// Make sure the migration table name was set.
if (empty($this->_migration_table))
{
show_error('Migrations configuration file (migration.php) must have "migration_table" set.');
}
// Migration basename regex
$this->_migration_regex = ($this->_migration_type === 'timestamp')
? '/^\d{14}_(\w+)$/'
: '/^\d{3}_(\w+)$/';
// Make sure a valid migration numbering type was set.
if ( ! in_array($this->_migration_type, array('sequential', 'timestamp')))
{
show_error('An invalid migration numbering type was specified: '.$this->_migration_type);
}
// If the migrations table is missing, make it
if ( ! $this->db->table_exists($this->_migration_table))
{
$this->dbforge->add_field(array(
'version' => array('type' => 'BIGINT', 'constraint' => 20),
));
$this->dbforge->create_table($this->_migration_table, TRUE);
$this->db->insert($this->_migration_table, array('version' => 0));
}
// Do we auto migrate to the latest migration?
if ($this->_migration_auto_latest === TRUE && ! $this->latest())
{
show_error($this->error_string());
}
}
// --------------------------------------------------------------------
/**
* Migrate to a schema version
*
* Calls each migration step required to get to the schema version of
* choice
*
* @param string $target_version Target schema version
* @return mixed TRUE if no migrations are found, current version string on success, FALSE on failure
*/
public function version($target_version)
{
// Note: We use strings, so that timestamp versions work on 32-bit systems
$current_version = $this->_get_version();
if ($this->_migration_type === 'sequential')
{
$target_version = sprintf('%03d', $target_version);
}
else
{
$target_version = (string) $target_version;
}
$migrations = $this->find_migrations();
if ($target_version > 0 && ! isset($migrations[$target_version]))
{
$this->_error_string = sprintf($this->lang->line('migration_not_found'), $target_version);
return FALSE;
}
if ($target_version > $current_version)
{
// Moving Up
$method = 'up';
}
else
{
// Moving Down, apply in reverse order
$method = 'down';
krsort($migrations);
}
if (empty($migrations))
{
return TRUE;
}
$previous = FALSE;
// Validate all available migrations, and run the ones within our target range
foreach ($migrations as $number => $file)
{
// Check for sequence gaps
if ($this->_migration_type === 'sequential' && $previous !== FALSE && abs($number - $previous) > 1)
{
$this->_error_string = sprintf($this->lang->line('migration_sequence_gap'), $number);
return FALSE;
}
include_once($file);
$class = 'Migration_'.ucfirst(strtolower($this->_get_migration_name(basename($file, '.php'))));
// Validate the migration file structure
if ( ! class_exists($class, FALSE))
{
$this->_error_string = sprintf($this->lang->line('migration_class_doesnt_exist'), $class);
return FALSE;
}
$previous = $number;
// Run migrations that are inside the target range
if (
($method === 'up' && $number > $current_version && $number <= $target_version) OR
($method === 'down' && $number <= $current_version && $number > $target_version)
)
{
$instance = new $class();
if ( ! is_callable(array($instance, $method)))
{
$this->_error_string = sprintf($this->lang->line('migration_missing_'.$method.'_method'), $class);
return FALSE;
}
log_message('debug', 'Migrating '.$method.' from version '.$current_version.' to version '.$number);
call_user_func(array($instance, $method));
$current_version = $number;
$this->_update_version($current_version);
}
}
// This is necessary when moving down, since the the last migration applied
// will be the down() method for the next migration up from the target
if ($current_version <> $target_version)
{
$current_version = $target_version;
$this->_update_version($current_version);
}
log_message('debug', 'Finished migrating to '.$current_version);
return $current_version;
}
// --------------------------------------------------------------------
/**
* Sets the schema to the latest migration
*
* @return mixed Current version string on success, FALSE on failure
*/
public function latest()
{
$migrations = $this->find_migrations();
if (empty($migrations))
{
$this->_error_string = $this->lang->line('migration_none_found');
return FALSE;
}
$last_migration = basename(end($migrations));
// Calculate the last migration step from existing migration
// filenames and proceed to the standard version migration
return $this->version($this->_get_migration_number($last_migration));
}
// --------------------------------------------------------------------
/**
* Sets the schema to the migration version set in config
*
* @return mixed TRUE if no migrations are found, current version string on success, FALSE on failure
*/
public function current()
{
return $this->version($this->_migration_version);
}
// --------------------------------------------------------------------
/**
* Error string
*
* @return string Error message returned as a string
*/
public function error_string()
{
return $this->_error_string;
}
// --------------------------------------------------------------------
/**
* Retrieves list of available migration scripts
*
* @return array list of migration file paths sorted by version
*/
public function find_migrations()
{
$migrations = array();
// Load all *_*.php files in the migrations path
foreach (glob($this->_migration_path.'*_*.php') as $file)
{
$name = basename($file, '.php');
// Filter out non-migration files
if (preg_match($this->_migration_regex, $name))
{
$number = $this->_get_migration_number($name);
// There cannot be duplicate migration numbers
if (isset($migrations[$number]))
{
$this->_error_string = sprintf($this->lang->line('migration_multiple_version'), $number);
show_error($this->_error_string);
}
$migrations[$number] = $file;
}
}
ksort($migrations);
return $migrations;
}
// --------------------------------------------------------------------
/**
* Extracts the migration number from a filename
*
* @param string $migration
* @return string Numeric portion of a migration filename
*/
protected function _get_migration_number($migration)
{
return sscanf($migration, '%[0-9]+', $number)
? $number : '0';
}
// --------------------------------------------------------------------
/**
* Extracts the migration class name from a filename
*
* @param string $migration
* @return string text portion of a migration filename
*/
protected function _get_migration_name($migration)
{
$parts = explode('_', $migration);
array_shift($parts);
return implode('_', $parts);
}
// --------------------------------------------------------------------
/**
* Retrieves current schema version
*
* @return string Current migration version
*/
protected function _get_version()
{
$row = $this->db->select('version')->get($this->_migration_table)->row();
return $row ? $row->version : '0';
}
// --------------------------------------------------------------------
/**
* Stores the current schema version
*
* @param string $migration Migration reached
* @return void
*/
protected function _update_version($migration)
{
$this->db->update($this->_migration_table, array(
'version' => $migration
));
}
// --------------------------------------------------------------------
/**
* Enable the use of CI super-global
*
* @param string $var
* @return mixed
*/
public function __get($var)
{
return get_instance()->$var;
}
}
You can’t perform that action at this time.