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Cannot deserialize Option<OffsetDateTime> for XML

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#685 1 comment 0 reactions 1 assignee View on GitHub

@heaths is already working on this.

Since Nov 6, 2025.

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Description

Azure.Core Client

The problem is that azure_core::time::rfc3339::option is designed for JSON deserialization where datetime values are simple strings. In XML, element content needs special handling. The XML deserializer sees <Start>2025-11-05T21:14:02.3927308Z</Start> as a map with a text node, not as a simple string.

The timestamp fails to deserialize because:

  1. The XML deserializer represents <Start>2025-11-05T21:14:02.3927308Z</Start> as a map structure (with text content)
  2. The azure_core::time::rfc3339::option deserializer expects a simple string value
  3. There's a mismatch between XML's structural representation and what the RFC3339 deserializer expects

I expect this may be a problem with quick-xml and will debug the issue. Hopefully I can get a PR merged wherever the issue is to fix this upstream.

Originally posted by @heaths in https://github.com/Azure/typespec-rust/pull/682#discussion_r2500509136

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Rust
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