Parity blocks can not be higher than data blocks, so `STANDARD` storage class parity can not be higher than N/2. (N being total number of drives)

The default value for the `STANDARD` storage class depends on the number of volumes in the erasure set:

| Erasure Set Size | Default Parity (EC:N) |
|------------------|-----------------------|
| 5 or fewer       |                 EC:2  |

	Length() (length int64, ok bool)
	DecimalSize() (precision int64, scale int64, ok bool)
	Nullable() (nullable bool, ok bool)
	Unique() (unique bool, ok bool)
	ScanType() reflect.Type
	Comment() (value string, ok bool)
	DefaultValue() (value string, ok bool)
}

type Index interface {
	Table() string
	Name() string
	Columns() []string
	PrimaryKey() (isPrimaryKey bool, ok bool)
	Unique() (unique bool, ok bool)
	Option() string

saving*. SQLModel understands that the database will provide the `id` and *defines the column as a non-null `INTEGER`* in the database schema. See <a href="https://sqlmodel.tiangolo.com/tutorial/create-db-and-table/#primary-key-id" class="external-link" target="_blank">SQLModel docs on primary keys</a> for details.

* `Field(index=True)` tells SQLModel that it should create a **SQL index** for this column, that would allow faster lookups in the database when reading data filtered by this column....

 * order of the various views.
 *
 * <p>The views returned by {@link #column}, {@link #columnKeySet()}, and {@link #columnMap()} have
 * iterators that don't support {@code remove()}. Otherwise, all optional operations are supported.
 * Null row keys, columns keys, and values are not supported.
 *
 * <p>Lookups by row key are often faster than lookups by column key, because the data is stored in

 * order of the various views.
 *
 * <p>The views returned by {@link #column}, {@link #columnKeySet()}, and {@link #columnMap()} have
 * iterators that don't support {@code remove()}. Otherwise, all optional operations are supported.
 * Null row keys, columns keys, and values are not supported.
 *
 * <p>Lookups by row key are often faster than lookups by column key, because the data is stored in

    // - Class/Member Variables -/
    // --------------------------/

    /**
     * The one-based line number. The value will be non-positive if
     * unknown.
     */
    private int lineNumber = -1;

    /**
     * The one-based column number. The value will be non-positive
     * if unknown.
     */
    private int columnNumber = -1;

    /**
     * Field source.
     */

!important;\n}\n\n.row-gap-5 {\n  row-gap: 3rem !important;\n}\n\n.column-gap-0 {\n  -moz-column-gap: 0 !important;\n  column-gap: 0 !important;\n}\n\n.column-gap-1 {\n  -moz-column-gap: 0.25rem !important;\n  column-gap: 0.25rem !important;\n}\n\n.column-gap-2 {\n  -moz-column-gap: 0.5rem !important;\n  column-gap: 0.5rem !important;\n}\n\n.column-gap-3 {\n  -moz-column-gap: 1rem !important;\n  column-gap: 1rem !important;\n}\n\n.column-gap-4 {\n  -moz-column-gap: 1.5rem !important;\n  column-gap: 1.5rem !impo...

İkinci parametre ise `dict` değerinin `value` değeri içindir:

{* ../../docs_src/python_types/tutorial008.py hl[1,4] *}


Bu şu anlama gelir:

*  `prices` değişkeni `dict` tipindedir:
    *  `dict` değişkeninin `key` değeri  `str` tipindedir (herbir item'ın "name" değeri).
    *  `dict` değişkeninin `value` değeri `float` tipindedir (lherbir item'ın "price" değeri).

#### `Optional`

		Id           int64
		Value        string
		IgnoredField int64 `gorm:"-"`
	}
	DB.Migrator().DropTable(&ElementWithIgnoredField{})
	DB.AutoMigrate(&ElementWithIgnoredField{})

	elem := ElementWithIgnoredField{Value: "foo", IgnoredField: 10}
	DB.Save(&elem)

	DB.Model(&ElementWithIgnoredField{}).
		Where("id = ?", elem.Id).
		Updates(&ElementWithIgnoredField{Value: "bar", IgnoredField: 100})

    #  Does it check differences of column-def order?
    #  (except added or deleted columns)
    #
    #; isCheckColumnDefOrderDiff = false
    # - - - - - - - - - -/

    # /- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    # o isCheckDbCommentDiff: (NotRequired - Default false)
    #  Does it check differences of table or column or others comment?
    #
    #; isCheckDbCommentDiff = false