Db
- Type
- Class
- Namespace
- craft\helpers
- Inherits
- craft\helpers\Db
- Since
- 3.0
Class Db
Public Methods
| Method | Description |
|---|---|
| areColumnTypesCompatible() | Returns whether two column type definitions are relatively compatible with each other. |
| deleteIfExists() | Executes a DELETE command, but only if there are any rows to delete. |
| escapeParam() | Escapes commas and asterisks in a string so they are not treated as special characters in craft\helpers\Db::parseParam(). |
| getMaxAllowedValueForNumericColumn() | Returns the maximum number allowed for a given column type. |
| getMinAllowedValueForNumericColumn() | Returns the minimum number allowed for a given column type. |
| getNumericalColumnType() | Returns a number column type, taking the min, max, and number of decimal points into account. |
| getSimplifiedColumnType() | Returns a simplified version of a given column type. |
| getTextualColumnStorageCapacity() | Returns the maximum number of bytes a given textual column type can hold for a given database. |
| getTextualColumnTypeByContentLength() | Given a length of a piece of content, returns the underlying database column type to use for saving. |
| isNumericColumnType() | Returns whether the given column type is numeric. |
| isTextualColumnType() | Returns whether the given column type is textual. |
| isTypeSupported() | Returns whether a given DB connection’s schema supports a column type. |
| parseColumnLength() | Parses a column type definition and returns just the column length/size. |
| parseColumnType() | Parses a column type definition and returns just the column type, if it can be determined. |
| parseDateParam() | Normalizes date params and then sends them off to parseParam(). |
| parseParam() | Parses a query param value and returns a yii\db\QueryInterface::where()-compatible condition. |
| prepareDateForDb() | Prepares a date to be sent to the database. |
| prepareValueForDb() | Prepares a value to be sent to the database. |
| prepareValuesForDb() | Prepares an array or object’s values to be sent to the database. |
areColumnTypesCompatible()
Returns whether two column type definitions are relatively compatible with each other.
Arguments
Returns
Signature
public static boolean areColumnTypesCompatible ( $typeA, $typeB )
deleteIfExists()
Executes a DELETE command, but only if there are any rows to delete.
Arguments
$table(string) – The table where the data will be deleted from.$condition(string, array) – The condition that will be put in the WHERE part. Please refer to craft\db\Query::where() on how to specify condition.$params(array) – The parameters to be bound to the command$db(craft\db\Connection, null)
Returns
integer – Number of rows affected by the execution.
Throws
- yii\db\Exception
execution failed
Signature
public static integer deleteIfExists ( \craft\helpers\string $table, $condition = '', array $params = [], craft\db\Connection $db = null )
escapeParam()
Escapes commas and asterisks in a string so they are not treated as special characters in craft\helpers\Db::parseParam().
Arguments
$value(string) – The param value.
Returns
string – The escaped param value.
Signature
public static string escapeParam ( \craft\helpers\string $value )
getMaxAllowedValueForNumericColumn()
Returns the maximum number allowed for a given column type.
Arguments
$columnType(string)
Returns
integer, false – The max allowed number, or false if it can't be determined
Signature
public static integer, false getMaxAllowedValueForNumericColumn ( $columnType )
getMinAllowedValueForNumericColumn()
Returns the minimum number allowed for a given column type.
Arguments
$columnType(string)
Returns
integer, false – The min allowed number, or false if it can't be determined
Signature
public static integer, false getMinAllowedValueForNumericColumn ( $columnType )
getNumericalColumnType()
Returns a number column type, taking the min, max, and number of decimal points into account.
Arguments
Returns
Throws
- yii\base\Exception
if no column types can contain this
Signature
public static string getNumericalColumnType ( \craft\helpers\int $min = null, \craft\helpers\int $max = null, \craft\helpers\int $decimals = null )
getSimplifiedColumnType()
Signature
public static string getSimplifiedColumnType ( $columnType )
getTextualColumnStorageCapacity()
Returns the maximum number of bytes a given textual column type can hold for a given database.
Arguments
$columnType(string) – The textual column type to check$db(craft\db\Connection, null) – The database connection
Returns
integer, null, false – The storage capacity of the column type in bytes, null if unlimited, or false or it can't be determined.
Signature
public static integer, null, false getTextualColumnStorageCapacity ( \craft\helpers\string $columnType, craft\db\Connection $db = null )
getTextualColumnTypeByContentLength()
Given a length of a piece of content, returns the underlying database column type to use for saving.
Arguments
$contentLength(integer)$db(craft\db\Connection, null) – The database connection
Returns
Throws
- yii\base\Exception
if using an unsupported connection type
Signature
public static string getTextualColumnTypeByContentLength ( \craft\helpers\int $contentLength, craft\db\Connection $db = null )
isNumericColumnType()
Signature
public static boolean isNumericColumnType ( \craft\helpers\string $columnType )
isTextualColumnType()
Signature
public static boolean isTextualColumnType ( \craft\helpers\string $columnType )
isTypeSupported()
Returns whether a given DB connection’s schema supports a column type.
Arguments
$type(string)$db(craft\db\Connection, null)
Returns
Signature
public static boolean isTypeSupported ( \craft\helpers\string $type, craft\db\Connection $db = null )
parseColumnLength()
Parses a column type definition and returns just the column length/size.
Arguments
$columnType(string)
Returns
Signature
public static integer, null parseColumnLength ( $columnType )
parseColumnType()
Parses a column type definition and returns just the column type, if it can be determined.
Arguments
$columnType(string)
Returns
Signature
public static string, null parseColumnType ( $columnType )
parseDateParam()
Normalizes date params and then sends them off to parseParam().
Arguments
Returns
mixed
Signature
public static mixed parseDateParam ( \craft\helpers\string $column, $value, \craft\helpers\string $defaultOperator = '=' )
parseParam()
Parses a query param value and returns a yii\db\QueryInterface::where()-compatible condition.
If the $value is a string, it will automatically be converted to an array, split on any commas within the
string (via craft\helpers\ArrayHelper::toArray()). If that is not desired behavior, you can escape the comma
with a backslash before it.
The first value can be set to either 'and' or 'or' to define whether all of the values must match, or
any. If it’s neither 'and' nor 'or', then 'or' will be assumed.
Values can begin with the operators 'not ', '!=', '<=', '>=', '<', '>', or '='. If they don’t,
'=' will be assumed.
Values can also be set to either ':empty:' or ':notempty:' if you want to search for empty or non-empty
database values. (An “empty” value is either NULL or an empty string of text).
Arguments
Returns
mixed
Signature
public static mixed parseParam ( \craft\helpers\string $column, $value, \craft\helpers\string $defaultOperator = '=' )
prepareDateForDb()
Prepares a date to be sent to the database.
Arguments
$date(mixed) – The date to be prepared
Returns
Signature
public static string, null prepareDateForDb ( $date )
prepareValueForDb()
Prepares a value to be sent to the database.
Arguments
$value(mixed) – The value to be prepared
Returns
mixed – The prepped value
Signature
public static mixed prepareValueForDb ( $value )
prepareValuesForDb()
Prepares an array or object’s values to be sent to the database.
Arguments
$values(mixed) – The values to be prepared
Returns
array – The prepared values
Signature
public static array prepareValuesForDb ( $values )
Constants
| Constant | Description |
|---|---|
SIMPLE_TYPE_NUMERIC | |
SIMPLE_TYPE_TEXTUAL |