Difference between revisions of "DML exceptions"
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(New page: In previous versions problems in database calls were ignored by default. TODO: add more info here, explanation and same examples.) |
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| − | In previous versions problems in database calls were ignored by default. | + | {{Template:Migrated|newDocId=/docs/apis/core/dml/exceptions}} |
| + | {{Moodle_2.0}}In previous versions problems in database calls were ignored by default. | ||
| − | + | ==Overview== | |
| + | [[Image:Dml_exceptions.png]] | ||
| + | |||
| + | Defined in lib/dmllib.php for now. | ||
| + | |||
| + | ===dml_connection_exception=== | ||
| + | Thrown when can not connect to database for any reason. | ||
| + | |||
| + | ===dml_read_exception=== | ||
| + | Problem occurred during reading from database. Originally indicated be returning ''false'' - this value was often confused with ''false'' return value meaning ''not found''. | ||
| + | |||
| + | ===dml_write_exception=== | ||
| + | Problem occurred during writing to database. Originally indicated be returning ''false''. | ||
| + | |||
| + | ==See also== | ||
| + | |||
| + | * [[Exceptions|Exceptions]]: General guidelines for using of exceptions in Moodle 2.0 | ||
| + | * [[DML functions|DML functions]]: Where all the functions used to handle DB data. ([[wikipedia:Data_Manipulation_Language|DML]]) are defined. | ||
| + | * [[DDL functions|DDL functions]]: Where all the functions used to handle DB objects ([[wikipedia:Data_Definition_Language|DDL]]) are defined. | ||
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Moodle 2.0
In previous versions problems in database calls were ignored by default.
Overview
Defined in lib/dmllib.php for now.
dml_connection_exception
Thrown when can not connect to database for any reason.
dml_read_exception
Problem occurred during reading from database. Originally indicated be returning false - this value was often confused with false return value meaning not found.
dml_write_exception
Problem occurred during writing to database. Originally indicated be returning false.
See also
- Exceptions: General guidelines for using of exceptions in Moodle 2.0
- DML functions: Where all the functions used to handle DB data. (DML) are defined.
- DDL functions: Where all the functions used to handle DB objects (DDL) are defined.
