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authorAndrey Andreev <narf@devilix.net>2014-01-03 12:57:58 +0100
committerAndrey Andreev <narf@devilix.net>2014-01-03 12:57:58 +0100
commit11f58dcb887316f86e9e1f148355bf3a01ca1877 (patch)
treeef881e4d71d08e9ae5dfd56a1300106395d08f38 /user_guide_src/source/libraries
parentc8f34854d6fe11f0b71aa6b1ebb30412937f062c (diff)
[ci skip] Update the Migration library docs
Diffstat (limited to 'user_guide_src/source/libraries')
-rw-r--r--user_guide_src/source/libraries/migration.rst116
1 files changed, 62 insertions, 54 deletions
diff --git a/user_guide_src/source/libraries/migration.rst b/user_guide_src/source/libraries/migration.rst
index b734f5c34..a007d5be7 100644
--- a/user_guide_src/source/libraries/migration.rst
+++ b/user_guide_src/source/libraries/migration.rst
@@ -10,8 +10,8 @@ need to be run against the production machines next time you deploy.
The database table **migration** tracks which migrations have already been
run so all you have to do is update your application files and
-call **$this->migration->current()** to work out which migrations should be run.
-The current version is found in **config/migration.php**.
+call ``$this->migration->current()`` to work out which migrations should be run.
+The current version is found in **application/config/migration.php**.
********************
Migration file names
@@ -28,23 +28,24 @@ method taken. Two numbering styles are available:
helps prevent numbering conflicts when working in a team environment, and is
the preferred scheme in CodeIgniter 3.0 and later.
-The desired style may be selected using the **$config['migration_type']**
-setting in your **migration.php** config file.
+The desired style may be selected using the ``$config['migration_type']``
+setting in your *application/config/migration.php* file.
Regardless of which numbering style you choose to use, prefix your migration
files with the migration number followed by an underscore and a descriptive
name for the migration. For example:
-* **001_add_blog.php** (sequential numbering)
-* **20121031100537_add_blog.php** (timestamp numbering)
+* 001_add_blog.php (sequential numbering)
+* 20121031100537_add_blog.php (timestamp numbering)
******************
Create a Migration
******************
This will be the first migration for a new site which has a blog. All
-migrations go in the folder **application/migrations/** and have names such
-as **20121031100537_add_blog.php**.::
+migrations go in the **application/migrations/** directory and have names such
+as *20121031100537_add_blog.php*.
+::
<?php
@@ -80,7 +81,7 @@ as **20121031100537_add_blog.php**.::
}
}
-Then in **application/config/migration.php** set **$config['migration_version'] = 1;**.
+Then in **application/config/migration.php** set ``$config['migration_version'] = 1;``.
*************
Usage Example
@@ -93,54 +94,18 @@ to update the schema.::
class Migrate extends CI_Controller
{
- public function index()
- {
- $this->load->library('migration');
-
- if ($this->migration->current() === FALSE)
- {
- show_error($this->migration->error_string());
- }
- }
- }
-
-******************
-Function Reference
-******************
-
-$this->migration->current()
-============================
-
-The current migration is whatever is set for **$config['migration_version']** in
-**application/config/migration.php**.
-
-$this->migration->error_string()
-=================================
-
-This returns a string of errors while performing a migration.
-
-$this->migration->find_migrations()
-====================================
-An array of migration filenames are returned that are found in the **migration_path**
-property.
-
-$this->migration->latest()
-===========================
-
-This works much the same way as current() but instead of looking for
-the **$config['migration_version']** the Migration class will use the very
-newest migration found in the filesystem.
-
-$this->migration->version()
-============================
-
-Version can be used to roll back changes or step forwards programmatically to
-specific versions. It works just like current but ignores **$config['migration_version']**.::
+ public function index()
+ {
+ $this->load->library('migration');
- $this->load->library('migration');
+ if ($this->migration->current() === FALSE)
+ {
+ show_error($this->migration->error_string());
+ }
+ }
- $this->migration->version(5);
+ }
*********************
Migration Preferences
@@ -161,3 +126,46 @@ Preference Default Options Des
**migration_type** 'timestamp' 'timestamp' / 'sequential' The type of numeric identifier used to name
migration files.
========================== ====================== ========================== =============================================
+
+***************
+Class Reference
+***************
+
+.. class:: CI_Migration
+
+ .. method:: current()
+
+ :returns: mixed
+
+ Migrates up to the current version (whatever is set for ``$config['migration_version']`` in *application/config/migration.php*).
+
+ .. method:: error_string()
+
+ :returns: string
+
+ This returns a string of errors that were detected while performing a migration.
+
+ .. method:: find_migrations()
+
+ :returns: array
+
+ An array of migration filenames are returned that are found in the **migration_path** property.
+
+ .. method:: latest()
+
+ :returns: mixed
+
+ This works much the same way as ``current()`` but instead of looking for
+ the ``$config['migration_version']`` the Migration class will use the very
+ newest migration found in the filesystem.
+
+ .. method:: version($target_version)
+
+ :param mixed $target_version: Migration version to process
+ :returns: mixed
+
+ Version can be used to roll back changes or step forwards programmatically to
+ specific versions. It works just like ``current()`` but ignores ``$config['migration_version']``.
+ ::
+
+ $this->migration->version(5); \ No newline at end of file