Attachments
Dealing with items attachments
Our common recommendation with attachments is to use them in moderation with a preference to documents in libraries and linking business objects items to that document using metadata and other logical relationship. But sometimes you need nothing more than just a simple binary addition to an item.
Working with attachments is mostly straightforward as you can only get a list of item's attachment, get a specific attachment by its name, add and delete an attachment.
list := sp.Web().GetList("Lists/MyList")
item := list.Items().GetByID(1)
attachments, err := item.Attachments().Get()
if err != nil {
log.Fatal(err)
}
for _, attachment := range attachments.Data() {
data := attachment.Data()
fmt.Printf("%s (%s)\n", data.FileName, data.ServerRelativeURL)
}
Attachments API provides little information, actually only FileName and ServerRelativeURL.
To detect which items have attachments the corresponding
Attachments property can be requested within an ordinary get items request:items, err := list.Items().Select("Id,Attachments").Get()
if err != nil {
log.Fatal(err)
}
for _, item := range items.Data() {
data := item.Data()
hasAttachments := "has no"
if data.Attachments {
hasAttachments = "has"
}
fmt.Printf("Item ID %d %s attachments\n", data.ID, hasAttachments)
}
list := sp.Web().GetList("Lists/MyList")
item := list.Items().GetByID(1)
content := strings.NewReader("Get content in a usual Go way you like")
item.Attachments().GetByName("MyAttachment.txt").Delete()
resp, err := item.Attachments().Add("MyAttachment.txt", content)
if err != nil {
log.Fatal(err)
}
fmt.Printf("Attachment is added: %s\n", resp.Data().ServerRelativeURL)
list := sp.Web().GetList("Lists/MyList")
item := list.Items().GetByID(1)
content, err := item.Attachments().GetByName("MyAttachment.txt").Download()
if err != nil {
log.Fatal(err)
}
fmt.Printf(
"Do whatever needed with this content of %d bytes\n",
len(content),
)
With an attachment you can:
- Download
- Get reader (download in a stream way)
- Delete
- or Recycle
These actions are rather obvious with the help of the Fluent API.
Last modified 3yr ago