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
|
<?php
/**
*
* @package db
* @copyright (c) 2011 phpBB Group
* @license http://opensource.org/licenses/gpl-license.php GNU Public License v2
*
*/
namespace phpbb\db\migration;
/**
* Abstract base class for database migrations
*
* Each migration consists of a set of schema and data changes to be implemented
* in a subclass. This class provides various utility methods to simplify editing
* a phpBB.
*
* @package db
*/
abstract class migration
{
/** @var \phpbb\config\config */
protected $config;
/** @var \phpbb\db\driver\driver */
protected $db;
/** @var \phpbb\db\tools */
protected $db_tools;
/** @var string */
protected $table_prefix;
/** @var string */
protected $phpbb_root_path;
/** @var string */
protected $php_ext;
/** @var array Errors, if any occurred */
protected $errors;
/** @var array List of queries executed through $this->sql_query() */
protected $queries = array();
/**
* Constructor
*
* @param \phpbb\config\config $config
* @param \phpbb\db\driver\driver $db
* @param \phpbb\db\tools $db_tools
* @param string $phpbb_root_path
* @param string $php_ext
* @param string $table_prefix
*/
public function __construct(\phpbb\config\config $config, \phpbb\db\driver\driver $db, \phpbb\db\tools $db_tools, $phpbb_root_path, $php_ext, $table_prefix)
{
$this->config = $config;
$this->db = $db;
$this->db_tools = $db_tools;
$this->table_prefix = $table_prefix;
$this->phpbb_root_path = $phpbb_root_path;
$this->php_ext = $php_ext;
$this->errors = array();
}
/**
* Defines other migrations to be applied first
*
* @return array An array of migration class names
*/
static public function depends_on()
{
return array();
}
/**
* Allows you to check if the migration is effectively installed (entirely optional)
*
* This is checked when a migration is installed. If true is returned, the migration will be set as
* installed without performing the database changes.
* This function is intended to help moving to migrations from a previous database updater, where some
* migrations may have been installed already even though they are not yet listed in the migrations table.
*
* @return bool True if this migration is installed, False if this migration is not installed (checked on install)
*/
public function effectively_installed()
{
return false;
}
/**
* Updates the database schema by providing a set of change instructions
*
* @return array Array of schema changes (compatible with db_tools->perform_schema_changes())
*/
public function update_schema()
{
return array();
}
/**
* Reverts the database schema by providing a set of change instructions
*
* @return array Array of schema changes (compatible with db_tools->perform_schema_changes())
*/
public function revert_schema()
{
return array();
}
/**
* Updates data by returning a list of instructions to be executed
*
* @return array Array of data update instructions
*/
public function update_data()
{
return array();
}
/**
* Reverts data by returning a list of instructions to be executed
*
* @return array Array of data instructions that will be performed on revert
* NOTE: calls to tools (such as config.add) are automatically reverted when
* possible, so you should not attempt to revert those, this is mostly for
* otherwise unrevertable calls (custom functions for example)
*/
public function revert_data()
{
return array();
}
/**
* Wrapper for running queries to generate user feedback on updates
*
* @param string $sql SQL query to run on the database
* @return mixed Query result from db->sql_query()
*/
protected function sql_query($sql)
{
$this->queries[] = $sql;
$this->db->sql_return_on_error(true);
if ($sql === 'begin')
{
$result = $this->db->sql_transaction('begin');
}
else if ($sql === 'commit')
{
$result = $this->db->sql_transaction('commit');
}
else
{
$result = $this->db->sql_query($sql);
if ($this->db->sql_error_triggered)
{
$this->errors[] = array(
'sql' => $this->db->sql_error_sql,
'code' => $this->db->sql_error_returned,
);
}
}
$this->db->sql_return_on_error(false);
return $result;
}
/**
* Get the list of queries run
*
* @return array
*/
public function get_queries()
{
return $this->queries;
}
}
|
