DbConfig

Type

Class

Namespace

craft\config

Inherits

craft\config\DbConfig » craft\config\BaseConfig » craft\base\Model » yii\base\Model » yii\base\Component » yii\base\BaseObject

Implements

ArrayAccess, IteratorAggregate, craft\base\ModelInterface, yii\base\Arrayable, yii\base\Configurable, yii\base\StaticInstanceInterface

Uses traits

craft\base\ClonefixTrait, yii\base\ArrayableTrait, yii\base\StaticInstanceTrait

Since

3.0.0

DB config class

View source

Public Properties

Property	Description
activeValidators	yii\validators\Validator – The validators applicable to the current scenario.
attributes	array – An array of key-value pairs of PDO attributes to pass into the PDO constructor.
behaviors	yii\base\Behavior – List of behaviors attached to this component.
charset	string – The charset to use when creating tables.
collation	string, null – The collation to use when creating tables.
database	string, null – The name of the database to select.
driver	string, null – The database driver to use.
dsn	string, null – The Data Source Name (“DSN”) that tells Craft how to connect to the database.
errors	array – Errors for all attributes or the specified attribute.
firstErrors	array – The first errors.
iterator	ArrayIterator – An iterator for traversing the items in the list.
password	string – The database password to connect with.
port	integer, null – The database server port.
scenario	string – The scenario that this model is in.
schema	string, null – The schema that Postgres is configured to use by default (PostgreSQL only).
server	string, null – The database server name or IP address.
setSchemaOnConnect	boolean – Whether the schema() should be explicitly used for database queries (PostgreSQL only).
tablePrefix	string, null – If you’re sharing Craft installs in a single database (MySQL) or a single database and using a shared schema (PostgreSQL), you can set a table prefix here to avoid per-install table naming conflicts.
unixSocket	string, null – MySQL only.
url	string, null – The database connection URL, if one was provided by your hosting environment.
useUnbufferedConnections	boolean – Whether batched queries should be executed on a separate, unbuffered database connection.
user	string – The database username to connect with.
validators	ArrayObject, yii\validators\Validator – All the validators declared in the model.

attributes

Type

array

Default value

[]

An array of key-value pairs of PDO attributes to pass into the PDO constructor.

For example, when using the MySQL PDO driver, if you wanted to enable a SSL database connection (assuming SSL is enabled in MySQL and 'user' can connect via SSL, you’d set these:

->attributes([
    PDO::MYSQL_ATTR_SSL_KEY => '/path/to/my/client-key.pem',
    PDO::MYSQL_ATTR_SSL_CERT => '/path/to/my/client-cert.pem',
    PDO::MYSQL_ATTR_SSL_CA => '/path/to/my/ca-cert.pem',
])

View source

charset

Type

string

Default value

'utf8'

The charset to use when creating tables.

TIP

You can change the character set and collation across all existing database tables using this terminal command:

php craft db/convert-charset

::: code

->charset('utf8mb4')

CRAFT_DB_CHARSET=utf8mb4

:::

View source

collation

Type

string, null

Default value

null

Since

3.6.4

The collation to use when creating tables.

This is only used by MySQL. If null, the charset’s default collation will be used.

Charset	Default collation
utf8	utf8_general_ci
utf8mb4	utf8mb4_0900_ai_ci

TIP

You can change the character set and collation across all existing database tables using this terminal command:

php craft db/convert-charset

::: code

->collation('utf8mb4_0900_ai_ci')

CRAFT_DB_COLLATION=utf8mb4_0900_ai_ci

:::

View source

database

Type

string, null

Default value

null

The name of the database to select.

::: code

->database('mydatabase')

CRAFT_DB_DATABASE=mydatabase

:::

View source

driver

Type

string, null

Default value

null

The database driver to use. Either mysql for MySQL or pgsql for PostgreSQL.

::: code

->driver('mysql')

CRAFT_DB_DRIVER=mysql

:::

View source

dsn

Type

string, null

Default value

null

The Data Source Name (“DSN”) that tells Craft how to connect to the database.

DSNs should begin with a driver prefix (mysql: or pgsql:), followed by driver-specific parameters. For example, mysql:host=127.0.0.1;port=3306;dbname=acme_corp.

• MySQL parameters: https://php.net/manual/en/ref.pdo-mysql.connection.php
• PostgreSQL parameters: https://php.net/manual/en/ref.pdo-pgsql.connection.php

::: code

->dsn('mysql:host=127.0.0.1;port=3306;dbname=acme_corp')

CRAFT_DB_DSN=mysql:host=127.0.0.1;port=3306;dbname=acme_corp

:::

View source

password

Type

string

Default value

''

The database password to connect with.

::: code

->password('super-secret')

CRAFT_DB_PASSWORD=super-secret

:::

View source

port

Type

integer, null

Default value

null

The database server port. Defaults to 3306 for MySQL and 5432 for PostgreSQL.

::: code

->port(3306)

CRAFT_DB_PORT=3306

:::

View source

schema

Type

string, null

Default value

'public'

The schema that Postgres is configured to use by default (PostgreSQL only).

TIP

To force Craft to use the specified schema regardless of PostgreSQL’s search_path setting, you must enable the setSchemaOnConnect() setting.

::: code

->schema('myschema,public')

CRAFT_DB_SCHEMA=myschema,public

:::

See also https://www.postgresql.org/docs/8.2/static/ddl-schemas.html

View source

server

Type

string, null

Default value

null

The database server name or IP address. Usually localhost or 127.0.0.1.

::: code

->server('localhost')

CRAFT_DB_SERVER=localhost

:::

View source

setSchemaOnConnect

Type

boolean

Default value

false

Since

3.7.27

Whether the schema() should be explicitly used for database queries (PostgreSQL only).

WARNING

This will cause an extra SET search_path SQL query to be executed per database connection. Ideally, PostgreSQL’s search_path setting should be configured to prioritize the desired schema.

::: code

->setSchemaOnConnect(true)

CRAFT_DB_SET_SCHEMA_ON_CONNECT=true

:::

View source

tablePrefix

Type

string, null

Default value

null

If you’re sharing Craft installs in a single database (MySQL) or a single database and using a shared schema (PostgreSQL), you can set a table prefix here to avoid per-install table naming conflicts. This can be no more than 5 characters, and must be all lowercase.

::: code

->tablePrefix('craft_')

CRAFT_DB_TABLE_PREFIX=craft_

:::

View source

unixSocket

Type

string, null

Default value

null

MySQL only. If this is set, the CLI connection string (used for yiic) will connect to the Unix socket instead of the server and port. If this is specified, then server and port settings are ignored.

::: code

->unixSocket('/Applications/MAMP/tmp/mysql/mysql.sock')

CRAFT_DB_UNIX_SOCKET=/Applications/MAMP/tmp/mysql/mysql.sock

:::

View source

url

Type

string, null

Default value

null

The database connection URL, if one was provided by your hosting environment.

If this is set, the values for driver(), user(), database(), server(), port(), and database() will be extracted from it.

::: code

->url('jdbc:mysql://database.foo:3306/mydb')

CRAFT_DB_URL=jdbc:mysql://database.foo:3306/mydb

:::

View source

useUnbufferedConnections

Type

boolean

Default value

false

Since

3.7.0

Whether batched queries should be executed on a separate, unbuffered database connection.

This setting only applies to MySQL. It can be enabled when working with high volume content, to prevent PHP from running out of memory when querying too much data at once. (See https://www.yiiframework.com/doc/guide/2.0/en/db-query-builder#batch-query-mysql for an explanation of MySQL’s batch query limitations.)

For more on Craft batch queries, see https://craftcms.com/knowledge-base/query-batching-batch-each.

::: code

->useUnbufferedConnections(true)

CRAFT_DB_USE_UNBUFFERED_CONNECTIONS=true

:::

View source

user

Type

string

Default value

'root'

The database username to connect with.

::: code

->user('db')

CRAFT_DB_USER=db

:::

View source

Protected Properties

Property	Description
filename	string, null – The config filename
renamedSettings	array – Settings that have been renamed

filename

Type

string, null

Default value

\craft\services\Config::CATEGORY_DB

The config filename

View source

Public Methods

Method	Description
__call()	Calls the named method which is not a class method.
__clone()
__construct()
__get()	Returns the value of a component property.
__isset()	Checks if a property is set, i.e. defined and not null.
__set()	Sets the value of a component property.
__unset()	Sets a component property to be null.
activeAttributes()	Returns the attribute names that are subject to validation in the current scenario.
addError()	Adds a new error to the specified attribute.
addErrors()	Adds a list of errors.
addModelErrors()	Adds errors from another model, with a given attribute name prefix.
afterValidate()	This method is invoked after validation ends.
attachBehavior()	Attaches a behavior to this component.
attachBehaviors()	Attaches a list of behaviors to the component.
attributeHints()	Returns the attribute hints.
attributeLabels()	Returns the attribute labels.
attributes()	Returns the list of attribute names.
beforeValidate()	This method is invoked before validation starts.
behaviors()	Returns a list of behaviors that this component should behave as.
canGetProperty()	Returns a value indicating whether a property can be read.
canSetProperty()	Returns a value indicating whether a property can be set.
charset()	The charset to use when creating tables.
className()	Returns the fully qualified name of this class.
clearErrors()	Removes errors for all attributes or a single attribute.
collation()	The collation to use when creating tables.
create()	Factory method for creating new config objects.
createValidators()	Creates validator objects based on the validation rules specified in rules().
database()	The name of the database to select.
datetimeAttributes()	Returns the names of any attributes that should hold DateTime values.
detachBehavior()	Detaches a behavior from the component.
detachBehaviors()	Detaches all behaviors from the component.
driver()	The database driver to use. Either mysql for MySQL or pgsql for PostgreSQL.
dsn()	The Data Source Name (“DSN”) that tells Craft how to connect to the database.
ensureBehaviors()	Makes sure that the behaviors declared in behaviors() are attached to this component.
extraFields()	Returns the list of fields that can be expanded further and returned by toArray().
fields()	Returns the list of fields that should be returned by default by toArray() when no specific fields are specified.
formName()	Returns the form name that this model class should use.
generateAttributeLabel()	Generates a user friendly attribute label based on the give attribute name.
getActiveValidators()	Returns the validators applicable to the current scenario.
getAttributeHint()	Returns the text hint for the specified attribute.
getAttributeLabel()	Returns the text label for the specified attribute.
getAttributes()	Returns attribute values.
getBehavior()	Returns the named behavior object.
getBehaviors()	Returns all behaviors attached to this component.
getErrorSummary()	Returns the errors for all attributes as a one-dimensional array.
getErrors()	Returns the errors for all attributes or a single attribute.
getFirstError()	Returns the first error of the specified attribute.
getFirstErrors()	Returns the first error of every attribute in the model.
getIterator()	Returns an iterator for traversing the attributes in the model.
getScenario()	Returns the scenario that this model is used in.
getValidators()	Returns all the validators declared in rules().
hasErrors()	Returns a value indicating whether there is any validation error.
hasEventHandlers()	Returns a value indicating whether there is any handler attached to the named event.
hasMethod()	Returns a value indicating whether a method is defined.
hasProperty()	Returns a value indicating whether a property is defined for this component.
init()	Initializes the object.
instance()	Returns static class instance, which can be used to obtain meta information.
isAttributeActive()	Returns a value indicating whether the attribute is active in the current scenario.
isAttributeRequired()	Returns a value indicating whether the attribute is required.
isAttributeSafe()	Returns a value indicating whether the attribute is safe for massive assignments.
load()	Populates the model with input data.
loadMultiple()	Populates a set of models with the data from end user.
off()	Detaches an existing event handler from this component.
offsetExists()	Returns whether there is an element at the specified offset.
offsetGet()	Returns the element at the specified offset.
offsetSet()	Sets the element at the specified offset.
offsetUnset()	Sets the element value at the specified offset to null.
on()	Attaches an event handler to an event.
onUnsafeAttribute()	This method is invoked when an unsafe attribute is being massively assigned.
password()	The database password to connect with.
pdoAttributes()	An array of key-value pairs of PDO attributes to pass into the PDO constructor.
port()	The database server port. Defaults to 3306 for MySQL and 5432 for PostgreSQL.
rules()	Returns the validation rules for attributes.
safeAttributes()	Returns the attribute names that are safe to be massively assigned in the current scenario.
scenarios()	Returns a list of scenarios and the corresponding active attributes.
schema()	The schema that Postgres is configured to use by default (PostgreSQL only).
server()	The database server name or IP address. Usually localhost or 127.0.0.1.
setAttributes()	Sets the attribute values in a massive way.
setScenario()	Sets the scenario for the model.
setSchemaOnConnect()	Whether the schema() should be explicitly used for database queries (PostgreSQL only).
tablePrefix()	If you’re sharing Craft installs in a single database (MySQL) or a single database and using a shared schema (PostgreSQL), you can set a table prefix here to avoid per-install table naming conflicts. This can be no more than 5 characters, and must be all lowercase.
toArray()	Converts the model into an array.
trigger()	Triggers an event.
unixSocket()	MySQL only. If this is set, the CLI connection string (used for yiic) will connect to the Unix socket instead of the server and port. If this is specified, then server and port settings are ignored.
url()	The database connection URL, if one was provided by your hosting environment.
useUnbufferedConnections()	Whether batched queries should be executed on a separate, unbuffered database connection.
user()	The database username to connect with.
validate()	Performs the data validation.
validateMultiple()	Validates multiple models.

charset()

Since

4.2.0

The charset to use when creating tables.

TIP

You can change the character set and collation across all existing database tables using this terminal command:

php craft db/convert-charset

->charset('utf8mb4')

View source

Arguments

• $value (string)

Returns

self

collation()

Since

4.2.0

The collation to use when creating tables.

This is only used by MySQL. If null, the charset’s default collation will be used.

Charset	Default collation
utf8	utf8_general_ci
utf8mb4	utf8mb4_0900_ai_ci

TIP

You can change the character set and collation across all existing database tables using this terminal command:

php craft db/convert-charset

->collation('utf8mb4_0900_ai_ci')

View source

Arguments

• $value (string, null)

Returns

self

database()

Since

4.2.0

The name of the database to select.

->database('mydatabase')

View source

Arguments

• $value (string, null)

Returns

self

Throws

• yii\base\InvalidConfigException

driver()

Since

4.2.0

The database driver to use. Either mysql for MySQL or pgsql for PostgreSQL.

->driver('mysql')

View source

Arguments

• $value (string, null)

Returns

self

Throws

• yii\base\InvalidConfigException

dsn()

Since

4.2.0

The Data Source Name (“DSN”) that tells Craft how to connect to the database.

DSNs should begin with a driver prefix (mysql: or pgsql:), followed by driver-specific parameters. For example, mysql:host=127.0.0.1;port=3306;dbname=acme_corp.

• MySQL parameters: https://php.net/manual/en/ref.pdo-mysql.connection.php
• PostgreSQL parameters: https://php.net/manual/en/ref.pdo-pgsql.connection.php

->dsn('mysql:host=127.0.0.1;port=3306;dbname=acme_corp')

View source

Arguments

• $value (string, null)

Returns

self

init()

Initializes the object.

This method is invoked at the end of the constructor after the object is initialized with the given configuration.

View source

Throws

• yii\base\InvalidConfigException

password()

Since

4.2.0

The database password to connect with.

->password('super-secret')

View source

Arguments

• $value (string)

Returns

self

pdoAttributes()

Since

4.2.0

An array of key-value pairs of PDO attributes to pass into the PDO constructor.

For example, when using the MySQL PDO driver, if you wanted to enable a SSL database connection (assuming SSL is enabled in MySQL and 'user' can connect via SSL, you’d set these:

->pdoAttributes([
    PDO::MYSQL_ATTR_SSL_KEY => '/path/to/my/client-key.pem',
    PDO::MYSQL_ATTR_SSL_CERT => '/path/to/my/client-cert.pem',
    PDO::MYSQL_ATTR_SSL_CA => '/path/to/my/ca-cert.pem',
])

View source

Arguments

• $value (array)

Returns

self

port()

Since

4.2.0

The database server port. Defaults to 3306 for MySQL and 5432 for PostgreSQL.

->port(3306)

View source

Arguments

• $value (integer, null)

Returns

self

Throws

• yii\base\InvalidConfigException

schema()

Since

4.2.0

The schema that Postgres is configured to use by default (PostgreSQL only).

TIP

To force Craft to use the specified schema regardless of PostgreSQL’s search_path setting, you must enable the setSchemaOnConnect() setting.

->schema('myschema,public')

See also https://www.postgresql.org/docs/8.2/static/ddl-schemas.htmlView source

Arguments

• $value (string, null)

Returns

self

server()

Since

4.2.0

The database server name or IP address. Usually localhost or 127.0.0.1.

->server('localhost')

View source

Arguments

• $value (string, null)

Returns

self

Throws

• yii\base\InvalidConfigException

setSchemaOnConnect()

Since

4.2.0

Whether the schema() should be explicitly used for database queries (PostgreSQL only).

WARNING

This will cause an extra SET search_path SQL query to be executed per database connection. Ideally, PostgreSQL’s search_path setting should be configured to prioritize the desired schema.

->setSchemaOnConnect()

View source

Arguments

• $value (boolean)

Returns

self

tablePrefix()

Since

4.2.0

If you’re sharing Craft installs in a single database (MySQL) or a single database and using a shared schema (PostgreSQL), you can set a table prefix here to avoid per-install table naming conflicts. This can be no more than 5 characters, and must be all lowercase.

->tablePrefix('craft_')

View source

Arguments

• $value (string, null)

Returns

self

Throws

• yii\base\InvalidConfigException

unixSocket()

Since

4.2.0

MySQL only. If this is set, the CLI connection string (used for yiic) will connect to the Unix socket instead of the server and port. If this is specified, then server and port settings are ignored.

->unixSocket('/Applications/MAMP/tmp/mysql/mysql.sock')

View source

Arguments

• $value (string, null)

Returns

self

Throws

• yii\base\InvalidConfigException

url()

Since

4.2.0

The database connection URL, if one was provided by your hosting environment.

If this is set, the values for driver(), user(), database(), server(), port(), and database() will be extracted from it.

->url('jdbc:mysql://database.foo:3306/mydb')

View source

Arguments

• $value (string, null)

Returns

self

useUnbufferedConnections()

Since

4.2.0

Whether batched queries should be executed on a separate, unbuffered database connection.

This setting only applies to MySQL. It can be enabled when working with high volume content, to prevent PHP from running out of memory when querying too much data at once. (See https://www.yiiframework.com/doc/guide/2.0/en/db-query-builder#batch-query-mysql for an explanation of MySQL’s batch query limitations.)

For more on Craft batch queries, see https://craftcms.com/knowledge-base/query-batching-batch-each.

->useUnbufferedConnections()

View source

Arguments

• $value (boolean)

Returns

self

user()

Since

4.2.0

The database username to connect with.

->user('db')

View source

Arguments

• $value (string)

Returns

self

Protected Methods

Method	Description
defineBehaviors()	Returns the behaviors to attach to this class.
defineRules()	Returns the validation rules for attributes.
extractFieldsFor()	Extract nested fields from a fields collection for a given root field Nested fields are separated with dots (.). e.g: "item.id" The previous example would extract "id".
extractRootFields()	Extracts the root field names from nested fields.
resolveFields()	Determines which fields can be returned by toArray().

Constants

Constant	Description
DRIVER_MYSQL
DRIVER_PGSQL
SCENARIO_DEFAULT	The name of the default scenario.