Checks if $this->bin represents a valid cache table.

This check is required to ensure that non-cache tables are not truncated accidentally when calling cache_clear_all().

Return value

boolean

1 call to DrupalDatabaseCache::isValidBin()

DrupalDatabaseCache::clear in includes/cache.inc

Implements DrupalCacheInterface::clear().

File

includes/cache.inc, line 578

Class

DrupalDatabaseCache

Defines a default cache implementation.

Code

function isValidBin() {
 if ($this->bin  == 'cache' || substr ($this->bin , 0, 6) == 'cache_') {
 // Skip schema check for bins with standard table names.
 return TRUE;
 }
 // These fields are required for any cache table.
 $fields = array(
 'cid',
 'data',
 'expire',
 'created',
 'serialized',
 );
 // Load the table schema.
 $schema = drupal_get_schema ($this->bin );
 // Confirm that all fields are present.
 return isset($schema['fields']) && !array_diff ($fields, array_keys ($schema['fields']));
}

---