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| {{Pendiente de traducir}}
| | #Redirect[[Autenticación por BasedeDatos externa]] |
| {{Autenticación}}
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| Location: ''Settings > Site administration > Plugins > Authentication > External database''
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| This method uses an external database table to check whether a given username and password is valid. If the user does not currently exist in Moodle a new account will be created and their information copied from the external database.
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| == Field mappings ==
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| This is done by mapping fields at the bottom of the database authentication page. Each data field in the user profile has a text field next to it. Enter the name of the column in the external database that maps to the profile data field.
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| '''Update Local''' - Specifies that the external data will be entered into the local field in question
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| * On Creation - specifies that this will only happen on the original login when the account is created for the first time.
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| * On Every Login - specifies that changes in the external data will be updated on the local Moodle field in question the next time the user logs in again.
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| '''Update External''' - Specifies just the opposite, meaning changes in the local Moodle field in question will update the corresponding field in the external database
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| * Never - Specifies this is disabled
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| * On Update - Enables this to happen if a change is made locally (additional configuration is probably required)
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| '''Lock Value''' - Only determines whether the local user can make a change in the Moodle field and does not affect the two settings above.
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| * Unlocked - A user can make changes locally in the Moodle field (assumably even if it contradicts the external database the next login would change it again if Update Local is set
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| * Locked - A user can never make changes
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| * Unlocked if empty - A user can only make changes if the field is not populated already from the external database (this would seem to indicate a user could only enter something into this field once and could not change it after saving)
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| == Automatic Synchronisation ==
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| The above method adds new users only when they log in. If you want user accounts to be created in Moodle independent of actual logins, the db authentication plugin offers a script you can run regularly via 'cron'. A typical cron entry will be as follows...
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| <pre>
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| 0 * * * * /usr/bin/php /path/to/moodle/auth/db/cli/sync_users.php >dev/null
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| </pre>
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| This runs every hour (adjust as required). It reads the entire table updating and creating local Moodle users.
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| ==Additional Notes==
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| * Some of the things that apply to [[Subir usuarios]] apply to the External database
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| ** Set password to "changeme" to force password reset
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| *** If you do this, it is '''critical''' that you provide a URL to change the password!
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| * Not all of the fields in the [[Subir usuarios]] are available for the External Database authentication. The only available fields are the fields listed in the data mapping section of the admin page for the External Database connection.
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| ==See also==
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| *Using Moodle [http://moodle.org/mod/forum/discuss.php?d=45444 Special and characters con tilde (accute accent) when connected to external database] forum discussion
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| *Using Moodle [http://moodle.org/mod/forum/discuss.php?d=75519 HELP!--User Authentication problem] forum discussion
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| [[de:Externe Datenbank]]
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| [[fr:Utiliser une base de données externe]]
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| [[ja:外部データベース認証]]
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| [[en:External database authentication]]
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