Db

Type

Class

Namespace

craft\helpers

Inherits

craft\helpers\Db

Since

3.0.0

Class Db

View source

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.
idByUid()	Returns the id of a row in the given table by its uid.
idsByUids()	Returns an array uid:id pairs from a given table, by their uids.
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.
parseBooleanParam()	Parses a query param value for a boolean column and returns a yii\db\QueryInterface::where()-compatible condition.
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()	Parses a query param value for a date/time column, and returns a yii\db\QueryInterface::where()-compatible condition.
parseDsn()	Parses a DSN string and returns an array with the driver and any driver params, or just a single key.
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.
uidById()	Returns the uid of a row in the given table by its id.
uidsByIds()	Returns an array id:uid pairs from a given table, by their ids.
url2config()	Generates a DB config from a database connection URL.

areColumnTypesCompatible()

Returns whether two column type definitions are relatively compatible with each other.

View source

Arguments

• $typeA (string)
• $typeB (string)

Returns

boolean

deleteIfExists()

Since

3.0.12

Executes a DELETE command, but only if there are any rows to delete.

View source

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

escapeParam()

Escapes commas and asterisks in a string so they are not treated as special characters in craft\helpers\Db::parseParam().

View source

Arguments

• $value (string) – The param value.

Returns

string – The escaped param value.

getMaxAllowedValueForNumericColumn()

Returns the maximum number allowed for a given column type.

View source

Arguments

• $columnType (string)

Returns

integer, false – The max allowed number, or false if it can't be determined

getMinAllowedValueForNumericColumn()

Returns the minimum number allowed for a given column type.

View source

Arguments

• $columnType (string)

Returns

integer, false – The min allowed number, or false if it can't be determined

getNumericalColumnType()

Returns a number column type, taking the min, max, and number of decimal points into account.

View source

Arguments

• $min (integer, null)
• $max (integer, null)
• $decimals (integer, null)

Returns

string

Throws

• yii\base\Exception
  if no column types can contain this

getSimplifiedColumnType()

Returns a simplified version of a given column type.

View source

Arguments

• $columnType (string)

Returns

string

getTextualColumnStorageCapacity()

Returns the maximum number of bytes a given textual column type can hold for a given database.

View source

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.

getTextualColumnTypeByContentLength()

Given a length of a piece of content, returns the underlying database column type to use for saving.

View source

Arguments

• $contentLength (integer)
• $db (craft\db\Connection, null) – The database connection

Returns

string

Throws

• yii\base\Exception
  if using an unsupported connection type

idByUid()

Since

3.1.0

Returns the id of a row in the given table by its uid.

View source

Arguments

• $table (string)
• $uid (string)

Returns

integer, null

idsByUids()

Since

3.1.0

Returns an array uid:id pairs from a given table, by their uids.

View source

Arguments

• $table (string)
• $uids (string[])

Returns

string[]

isNumericColumnType()

Returns whether the given column type is numeric.

View source

Arguments

• $columnType (string)

Returns

boolean

isTextualColumnType()

Returns whether the given column type is textual.

View source

Arguments

• $columnType (string)

Returns

boolean

isTypeSupported()

Returns whether a given DB connection’s schema supports a column type.

View source

Arguments

• $type (string)
• $db (craft\db\Connection, null)

Returns

boolean

Throws

• yii\base\NotSupportedException

parseBooleanParam()

Since

3.4.15

Parses a query param value for a boolean column and returns a yii\db\QueryInterface::where()-compatible condition.

The follow values are supported:

• true or false
• :empty: or :notempty: (normalizes to false and true)
• 'not x' or '!= x' (normalizes to the opposite of the boolean value of x)
• Anything else (normalizes to the boolean value of itself)

If $defaultValue is set, and it matches the normalized $value, then the resulting condition will match any null values as well.

View source

Arguments

• $column (string) – The database column that the param is targeting.
• $value (string, boolean) – The param value
• $defaultValue (boolean, null) – How null values should be treated

Returns

mixed

parseColumnLength()

Parses a column type definition and returns just the column length/size.

View source

Arguments

• $columnType (string)

Returns

integer, null

parseColumnType()

Parses a column type definition and returns just the column type, if it can be determined.

View source

Arguments

• $columnType (string)

Returns

string, null

parseDateParam()

Parses a query param value for a date/time column, and returns a yii\db\QueryInterface::where()-compatible condition.

View source

Arguments

• $column (string) – The database column that the param is targeting.
• $value (string, array, DateTime) – The param value
• $defaultOperator (string) – The default operator to apply to the values (can be not, !=, <=, >=, <, >, or =)

Returns

mixed

parseDsn()

Since

3.4.0

Parses a DSN string and returns an array with the driver and any driver params, or just a single key.

View source

Arguments

• $dsn (string)
• $key (string, null) – The key that is needed from the DSN. If this is

Returns

array, string, false – The full array, or the specific key value, or false if $key is a param that doesn’t exist in the DSN string.

Throws

• yii\base\InvalidArgumentException
  if $dsn is invalid

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).

View source

Arguments

• $column (string) – The database column that the param is targeting.
• $value (string, integer, array) – The param value(s).
• $defaultOperator (string) – The default operator to apply to the values (can be not, !=, <=, >=, <, >, or =)
• $caseInsensitive (boolean) – Whether the resulting condition should be case-insensitive
• $columnType (string, null) – The database column type the param is targeting

Returns

mixed

prepareDateForDb()

Prepares a date to be sent to the database.

View source

Arguments

• $date (mixed) – The date to be prepared
• $stripSeconds (boolean) – Whether the seconds should be omitted from the formatted string

Returns

string, null – The prepped date, or null if it could not be prepared

prepareValueForDb()

Prepares a value to be sent to the database.

View source

Arguments

• $value (mixed) – The value to be prepared

Returns

mixed – The prepped value

prepareValuesForDb()

Prepares an array or object’s values to be sent to the database.

View source

Arguments

• $values (mixed) – The values to be prepared

Returns

array – The prepared values

uidById()

Since

3.1.0

Returns the uid of a row in the given table by its id.

View source

Arguments

• $table (string)
• $id (integer)

Returns

string, null

uidsByIds()

Since

3.1.0

Returns an array id:uid pairs from a given table, by their ids.

View source

Arguments

• $table (string)
• $ids (integer[])

Returns

string[]

url2config()

Since

3.4.0

Generates a DB config from a database connection URL.

This can be used from config/db.php:

View source

Arguments

• $url (string)

Returns

array

Example

• PHP

$url = craft\helpers\App::env('DB_URL');
return craft\helpers\Db::url2config($url);

Constants

Constant	Description
SIMPLE_TYPE_NUMERIC
SIMPLE_TYPE_TEXTUAL