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

Returns

boolean

# deleteIfExists()

Since
3.0.12

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

View source

Arguments

Returns

integer – Number of rows affected by the execution.

Throws

# 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

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

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

Returns

string

Throws

# getSimplifiedColumnType()

Returns a simplified version of a given column type.

View source

Arguments

Returns

string

# getTextualColumnStorageCapacity()

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

View source

Arguments

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

Returns

string

Throws

# idByUid()

Since
3.1.0

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

View source

Arguments

Returns

integer, null

# idsByUids()

Since
3.1.0

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

View source

Arguments

Returns

string[]

# isNumericColumnType()

Returns whether the given column type is numeric.

View source

Arguments

Returns

boolean

# isTextualColumnType()

Returns whether the given column type is textual.

View source

Arguments

Returns

boolean

# isTypeSupported()

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

View source

Arguments

Returns

boolean

Throws

# 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

Returns

integer, null

# parseColumnType()

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

View source

Arguments

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

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

# 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

Returns

string, null

# uidsByIds()

Since
3.1.0

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

View source

Arguments

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

Returns

array

Example

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

# Constants

Constant Description
SIMPLE_TYPE_NUMERIC
SIMPLE_TYPE_TEXTUAL