Table (class)
Class Table
Represents a single table in a database schema.
Can either be populated using the reflection API's or by incrementally building an instance using methods.
Once created Table instances can be added to Schema\Collection objects. They can also be converted into SQL using the createSql(), dropSql() and truncateSql() methods.
Method Detail
__constructsource public
__construct( string $table , array $columns [] )
Constructor.
Parameters
- string
$table
- The table name.
- array
$columns
optional [] - The list of columns for the schema.
_checkForeignKeysource protected
_checkForeignKey( array $attrs )
Helper method to check/validate foreign keys.
Parameters
- array
$attrs
- Attributes to set.
Returns
array
array
Throws
Cake\Database\Exception
When foreign key definition is not valid.
addColumnsource public
addColumn( string $name , array $attrs )
Add a column to the table.
Attributes
Columns can have several attributes:
-
type
The type of the column. This should be one of CakePHP's abstract types. -
length
The length of the column. -
precision
The number of decimal places to store for float and decimal types. -
default
The default value of the column. -
null
Whether or not the column can hold nulls. -
fixed
Whether or not the column is a fixed length column. This is only present/valid with string columns. -
unsigned
Whether or not the column is an unsigned column. This is only present/valid for integer, decimal, float columns.
In addition to the above keys, the following keys are implemented in some database dialects, but not all:
-
comment
The comment for the column.
Parameters
- string
$name
- The name of the column
- array
$attrs
- The attributes for the column.
Returns
mixed
$this
addConstraintsource public
addConstraint( string $name , array $attrs )
Add a constraint.
Used to add constraints to a table. For example primary keys, unique keys and foreign keys.
Attributes
-
type
The type of constraint being added. -
columns
The columns in the index. -
references
The table, column a foreign key references. -
update
The behavior on update. Options are 'restrict', 'setNull', 'cascade', 'noAction'. -
delete
The behavior on delete. Options are 'restrict', 'setNull', 'cascade', 'noAction'.
The default for 'update' & 'delete' is 'cascade'.
Parameters
- string
$name
- The name of the constraint.
- array
$attrs
- The attributes for the constraint.
Returns
mixed
$this
Throws
Cake\Database\Exception
\Cake\Database\Exception
addConstraintSqlsource public
addConstraintSql( Cake\Datasource\ConnectionInterface $connection )
Generate the SQL statements to add the constraints to the table
Parameters
-
Cake\Datasource\ConnectionInterface
$connection
- The connection to generate SQL for.
Returns
array
SQL to drop a table.
addIndexsource public
addIndex( string $name , array $attrs )
Add an index.
Used to add indexes, and full text indexes in platforms that support them.
Attributes
-
type
The type of index being added. -
columns
The columns in the index.
Parameters
- string
$name
- The name of the index.
- array
$attrs
- The attributes for the index.
Returns
mixed
$this
Throws
Cake\Database\Exception
\Cake\Database\Exception
baseColumnTypesource public
baseColumnType( string $column )
Returns the base type name for the provided column. This represent the database type a more complex class is based upon.
Parameters
- string
$column
- The column name to get the base type from
Returns
string
The base type name
columnsource public
column( string $name )
Get column data in the table.
Parameters
- string
$name
- The column name.
Returns
array|null
Column data or null.
columnTypesource public
columnType( string $name , string $type null )
Sets the type of a column, or returns its current type if none is passed.
Parameters
- string
$name
- The column to get the type of.
- string
$type
optional null - The type to set the column to.
Returns
string|null
Either the column type or null.
constraintsource public
constraint( string $name )
Read information about a constraint based on name.
Parameters
- string
$name
- The name of the constraint.
Returns
array|null
Array of constraint data, or null
constraintssource public
constraints( )
Get the names of all the constraints in the table.
Returns
array
array
createSqlsource public
createSql( Cake\Datasource\ConnectionInterface $connection )
Generate the SQL to create the Table.
Uses the connection to access the schema dialect to generate platform specific SQL.
Parameters
-
Cake\Datasource\ConnectionInterface
$connection
- The connection to generate SQL for
Returns
array
List of SQL statements to create the table and the required indexes.
defaultValuessource public
defaultValues( )
Get a hash of columns and their default values.
Returns
array
array
dropConstraintsource public
dropConstraint( string $name )
Remove a constraint.
Parameters
- string
$name
- Name of the constraint to remove
dropConstraintSqlsource public
dropConstraintSql( Cake\Datasource\ConnectionInterface $connection )
Generate the SQL statements to drop the constraints to the table
Parameters
-
Cake\Datasource\ConnectionInterface
$connection
- The connection to generate SQL for.
Returns
array
SQL to drop a table.
dropSqlsource public
dropSql( Cake\Datasource\ConnectionInterface $connection )
Generate the SQL to drop a table.
Uses the connection to access the schema dialect to generate platform specific SQL.
Parameters
-
Cake\Datasource\ConnectionInterface
$connection
- The connection to generate SQL for.
Returns
array
SQL to drop a table.
hasAutoincrementsource public
hasAutoincrement( )
Check whether or not a table has an autoIncrement column defined.
Returns
boolean
bool
indexsource public
index( string $name )
Read information about an index based on name.
Parameters
- string
$name
- The name of the index.
Returns
array|null
Array of index data, or null
isNullablesource public
isNullable( string $name )
Check whether or not a field is nullable
Missing columns are nullable.
Parameters
- string
$name
- The column to get the type of.
Returns
boolean
Whether or not the field is nullable.
optionssource public
options( array|null $options null )
Get/set the options for a table.
Table options allow you to set platform specific table level options. For example the engine type in MySQL.
Parameters
- array|null
$options
optional null - The options to set, or null to read options.
Returns
mixed
$this|array Either the table instance, or an array of options when reading.
primaryKeysource public
primaryKey( )
Get the column(s) used for the primary key.
Returns
array
Column name(s) for the primary key. An empty list will be returned when the table has no primary key.
temporarysource public
temporary( boolean|null $set null )
Get/Set whether the table is temporary in the database
Parameters
- boolean|null
$set
optional null - whether or not the table is to be temporary
Returns
mixed
$this|bool Either the table instance, the current temporary setting
truncateSqlsource public
truncateSql( Cake\Datasource\ConnectionInterface $connection )
Generate the SQL statements to truncate a table
Parameters
-
Cake\Datasource\ConnectionInterface
$connection
- The connection to generate SQL for.
Returns
array
SQL to truncate a table.
typeMapsource public
typeMap( )
Returns an array where the keys are the column names in the schema and the values the database type they have.
Returns
array
array
Constants summary
string | ACTION_CASCADE Foreign key cascade action | 'cascade' |
string | ACTION_NO_ACTION Foreign key no action | 'noAction' |
string | ACTION_RESTRICT Foreign key restrict action | 'restrict' |
string | ACTION_SET_DEFAULT Foreign key restrict default | 'setDefault' |
string | ACTION_SET_NULL Foreign key set null action | 'setNull' |
string | CONSTRAINT_FOREIGN Foreign constraint type | 'foreign' |
string | CONSTRAINT_PRIMARY Primary constraint type | 'primary' |
string | CONSTRAINT_UNIQUE Unique constraint type | 'unique' |
string | INDEX_FULLTEXT Fulltext index type | 'fulltext' |
string | INDEX_INDEX Index - index type | 'index' |
Properties summary
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http://api.cakephp.org/3.1/class-Cake.Database.Schema.Table.html