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feat(batch): reflect tags in batch send #79

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729d392
feat(batch): document and test scheduled_at, tags, and attachments
cursoragent Jul 10, 2026
25bbaf6
fix(batch): scope batch support to tags only
cursoragent Jul 13, 2026
bfdb267
docs: revert CreateEmailBaseOptions batch doc link
cursoragent Jul 15, 2026
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@ and this project adheres to

### Added

- batch send support for `tags` on [`CreateEmailBaseOptions`](https://docs.rs/resend-rs/latest/resend_rs/types/struct.CreateEmailBaseOptions.html)
- add `message_id` to `Email` and webhook `EmailBody` types (https://github.com/resend/resend-rust/pull/77)


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55 changes: 54 additions & 1 deletion src/batch.rs
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Expand Up @@ -20,6 +20,9 @@ impl BatchSvc {
/// Instead of sending one email per HTTP request, we provide a batching endpoint
/// that permits you to send up to 100 emails in a single API call.
///
/// Each [`CreateEmailBaseOptions`] in the batch supports `tags`, in addition to
/// the other send-email body parameters.
Comment on lines +23 to +24

@cubic-dev-ai cubic-dev-ai Bot Jul 13, 2026

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P3: Users can still infer from this CreateEmailBaseOptions documentation that all of the shared send-email fields work in a batch, including attachments and scheduled_at, even though the batch endpoint rejects or ignores them. A concise limitation note here would prevent misuse of the shared builder.

Prompt for AI agents 
Check if this issue is valid — if so, understand the root cause and fix it. At src/batch.rs, line 23:

<comment>Users can still infer from this `CreateEmailBaseOptions` documentation that all of the shared send-email fields work in a batch, including `attachments` and `scheduled_at`, even though the batch endpoint rejects or ignores them. A concise limitation note here would prevent misuse of the shared builder.</comment>

<file context>
@@ -20,8 +20,8 @@ impl BatchSvc {
     ///
-    /// Each [`CreateEmailBaseOptions`] in the batch supports `scheduled_at`, `tags`,
-    /// and `attachments`, in addition to the other send-email body parameters.
+    /// Each [`CreateEmailBaseOptions`] in the batch supports `tags`, in addition to
+    /// the other send-email body parameters.
     ///
</file context>
Suggested change
/// Each [`CreateEmailBaseOptions`] in the batch supports `tags`, in addition to
/// the other send-email body parameters.
/// Batch sends support `tags` on each [`CreateEmailBaseOptions`]. The
/// `attachments` and `scheduled_at` fields are not supported.

///
/// <https://resend.com/docs/api-reference/emails/send-batch-emails>
#[maybe_async::maybe_async]
pub async fn send<T>(
Expand Down Expand Up @@ -123,7 +126,7 @@ mod test {
use crate::test::{CLIENT, DebugResult};
use crate::types::{
BatchValidation, CreateEmailBaseOptions, CreateTemplateOptions, EmailEvent, EmailTemplate,
Variable, VariableType,
Tag, Variable, VariableType,
};

#[tokio_shared_rt::test(shared = true)]
Expand Down Expand Up @@ -323,4 +326,54 @@ mod test {

Ok(())
}

#[test]
fn serialize_tags() {
use serde_json::json;

let email = CreateEmailBaseOptions::new(
"Acme <onboarding@resend.dev>",
["delivered@resend.dev"],
"hello world",
)
.with_html("<h1>it works!</h1>")
.with_tag(Tag::new("category", "confirm_email"));

let emails = vec![email];
let value = serde_json::to_value(&emails).unwrap();

assert_eq!(
value[0]["tags"],
json!([{"name": "category", "value": "confirm_email"}])
);
}

#[tokio_shared_rt::test(shared = true)]
#[cfg(not(feature = "blocking"))]
async fn tags() -> DebugResult<()> {
let resend = &*CLIENT;
std::thread::sleep(std::time::Duration::from_secs(1));

let emails = vec![
CreateEmailBaseOptions::new(
"Acme <onboarding@resend.dev>",
["delivered@resend.dev"],
"hello world",
)
.with_html("<h1>it works!</h1>")
.with_tag(Tag::new("category", "confirm_email")),
CreateEmailBaseOptions::new(
"Acme <onboarding@resend.dev>",
["delivered@resend.dev"],
"world hello",
)
.with_html("<p>it works!</p>")
.with_tag(Tag::new("category", "confirm_email")),
];

let emails = resend.batch.send(emails).await?;
assert_eq!(emails.len(), 2);

Ok(())
}
}