Summary of property attributes

The following attributes are direct children of the property declaration:

Attribute	Description	Example
readOnly	Boolean identifying if the property as read-only. (The default is false.)	"readOnly": true
x-gw-nullable	Boolean identifying if the property can be explicitly set to null. (The default is true.) Used to set a property as required by the database. For more information, see Properties required by the database.	"x-gw-nullable": false
x-gw-sinceExtensionsVersion	String identifying the first version of the API to include the extension property	"x-gw-sinceExtensionsVersion": "1.​1.​0"

The following attributes are declared in the x-gw-extension object:

Attribute	Description	Example
createOnly	Boolean identifying if the property can be specified only when the object is created. (The default is false.)	"createOnly": true
filterable	Boolean identifying if the filter query parameter can be used on this property. In other words, collections can be filtered using this property. (The default is false.)	"filterable": true
requiredForCreate	Boolean identifying if the property must be specified when the object is created. (The default is false.) Used to set a property as required by the database. For more information, see Properties required by the database.	"requiredForCreate": true
sortable	Boolean identifying if the sort query parameter can be used on this property. In other words, collections can be sorted using this property. (The default is false.)	"sortable": true