$expand

Expands an image stored in an Image attribute (e.g., Employee(1)/photo?$imageformat=best&$expand=photo)
or
Expands an BLOB attribute to save it.

Compatibility: For compatibility reasons, $expand can be used to expand a relational attribute (e.g., Company(1)?$expand=staff or Employee/?$filter="firstName BEGIN a"&$expand=employer). It is however recommended to use $attributes for this feature.

画像属性の表示

画像属性の全体像を表示させるには、次のように書きます:

GET /rest/Employee(1)/photo?$imageformat=best&$version=1&$expand=photo

For more information about the image formats, refer to $imageformat. For more information about the version parameter, refer to $version.

BLOB属性のディスク保存

データクラスに保存されている BLOB をディスクに保存するには、$binary に "true" を渡すことで、次のように書けます:

GET /rest/Company(11)/blobAtt?$binary=true&$expand=blobAtt