serde-xml-rs: 在序列化时出现LastElementNameNotAvailable错误。

huangapple
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英文:

serde-xml-rs: LastElementNameNotAvailable when serializing

问题

在我的项目中，我遇到了一个错误，其中我使用 serde-xml-rs 解析和序列化 XML。

Cargo.toml

  1. [package]
  2. name = "serde_xml_rs_serialization_error"
  3. version = "0.1.0"
  4. edition = "2021"
  6. # 更多键及其定义，请参见 https://doc.rust-lang.org/cargo/reference/manifest.html
  8. [dependencies]
  9. serde = { version = "1.0.164", features = ["derive"] }
  10. serde-xml-rs = "0.6.0"

src/main.rs

  1. use serde::{Deserialize, Serialize};
  3. #[derive(Clone, Debug, Deserialize, Serialize)]
  4. struct Types {
  5.     #[serde(rename = "type")]
  6.     types: Vec<Type>,
  7. }
  9. #[derive(Clone, Debug, Deserialize, Serialize)]
  10. struct Type {
  11.     name: String,
  12. }
  14. const XML: &str = r#"<types>
  15.     <type name="first"/>
  16.     <type name="second"/>
  17. </types>"#;
  19. fn main() {
  20.     let types: Types = serde_xml_rs::from_str(XML).expect("无法解析 XML。");
  21.     dbg!(&types);
  22.     match serde_xml_rs::to_string(&types) {
  23.         Ok(xml) => {
  24.             dbg!(xml);
  25.         }
  26.         Err(error) => {
  27.             dbg!(error);
  28.         }
  29.     };
  30. }

我期望得到一个序列化的 XML 字符串，但实际上它产生了一个错误:

  1. cargo run
  2.     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
  3.      Running `target\debug\serde_xml_rs_serialization_error.exe`
  4. [src\main.rs:21] &types = Types {
  5.     types: [
  6.         Type {
  7.             name: "first",
  8.         },
  9.         Type {
  10.             name: "second",
  11.         },
  12.     ],
  13. }
  14. [src\main.rs:27] error = Writer {
  15.     source: LastElementNameNotAvailable,
  16. }

我在这里做错了什么？
1: https://docs.rs/serde-xml-rs/latest/serde_xml_rs/

英文:

So I encountered this error in one of my projects where I parse and serialize XML using serde-xml-rs.

Cargo.toml

  1. [package]
  2. name = "serde_xml_rs_serialization_error"
  3. version = "0.1.0"
  4. edition = "2021"
  6. # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
  8. [dependencies]
  9. serde = { version = "1.0.164", features = ["derive"] }
  10. serde-xml-rs = "0.6.0"

src/main.rs

  1. use serde::{Deserialize, Serialize};
  3. #[derive(Clone, Debug, Deserialize, Serialize)]
  4. struct Types {
  5.     #[serde(rename = "type")]
  6.     types: Vec<Type>,
  7. }
  9. #[derive(Clone, Debug, Deserialize, Serialize)]
  10. struct Type {
  11.     name: String,
  12. }
  14. const XML: &str = r#"<types>
  15.     <type name="first"/>
  16.     <type name="second"/>
  17. </types>"#;
  19. fn main() {
  20.     let types: Types = serde_xml_rs::from_str(XML).expect("Cannot parse XML.");
  21.     dbg!(&types);
  22.     match serde_xml_rs::to_string(&types) {
  23.         Ok(xml) => {
  24.             dbg!(xml);
  25.         }
  26.         Err(error) => {
  27.             dbg!(error);
  28.         }
  29.     };
  30. }

I expected a serialized XML string, but instead it produces an error:

  1.  cargo run
  2.     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
  3.      Running `target\debug\serde_xml_rs_serialization_error.exe`
  4. [src\main.rs:21] &types = Types {
  5.     types: [
  6.         Type {
  7.             name: "first",
  8.         },
  9.         Type {
  10.             name: "second",
  11.         },
  12.     ],
  13. }
  14. [src\main.rs:27] error = Writer {
  15.     source: LastElementNameNotAvailable,
  16. }

What am I doing wrong here?

答案1

得分: 0

这是一个关于serde-xml-rs的问题，让我浪费了半天的时间。

使用 quick-xml 替代 serde-xml-rs 解决了这个问题：

Cargo.toml

  1. [package]
  2. name = "serde_xml_rs_serialization_error"
  3. version = "0.1.0"
  4. edition = "2021"
  6. # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
  8. [dependencies]
  9. serde = { version = "1.0.164", features = ["derive"] }
  10. quick-xml = { version = "0.28.2", features = ["serialize"] }

src/main.rs

  1. use serde::{Deserialize, Serialize};
  3. #[derive(Clone, Debug, Deserialize, Serialize)]
  4. struct Types {
  5.     #[serde(rename = "type")]
  6.     types: Vec<Type>,
  7. }
  9. #[derive(Clone, Debug, Deserialize, Serialize)]
  10. struct Type {
  11.     #[serde(rename = "@name")]
  12.     name: String,
  13. }
  15. const XML: &str = r#"<types>
  16.     <type name="first"/>
  17.     <type name="second"/>
  18. </types>"#;
  20. fn main() {
  21.     let types: Types = quick_xml::de::from_str(XML).expect("Cannot parse XML.");
  22.     dbg!(&types);
  23.     match quick_xml::se::to_string(&types) {
  24.         Ok(xml) => {
  25.             dbg!(xml);
  26.         }
  27.         Err(error) => {
  28.             dbg!(error);
  29.         }
  30.     };
  31. }
英文:

It's a bug in serde-xml-rs, that cost me half a day.

Using quick-xml instead of serde-xml-rs solved the issue:

Cargo.toml

  1. [package]
  2. name = &quot;serde_xml_rs_serialization_error&quot;
  3. version = &quot;0.1.0&quot;
  4. edition = &quot;2021&quot;
  6. # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
  8. [dependencies]
  9. serde = { version = &quot;1.0.164&quot;, features = [&quot;derive&quot;] }
  10. quick-xml = { version = &quot;0.28.2&quot;, features = [&quot;serialize&quot;] }

src/main.rs

  1. use serde::{Deserialize, Serialize};
  3. #[derive(Clone, Debug, Deserialize, Serialize)]
  4. struct Types {
  5.     #[serde(rename = &quot;type&quot;)]
  6.     types: Vec&lt;Type&gt;,
  7. }
  9. #[derive(Clone, Debug, Deserialize, Serialize)]
  10. struct Type {
  11.     #[serde(rename = &quot;@name&quot;)]
  12.     name: String,
  13. }
  15. const XML: &amp;str = r#&quot;&lt;types&gt;
  16.     &lt;type name=&quot;first&quot;/&gt;
  17.     &lt;type name=&quot;second&quot;/&gt;
  18. &lt;/types&gt;&quot;#;
  20. fn main() {
  21.     let types: Types = quick_xml::de::from_str(XML).expect(&quot;Cannot parse XML.&quot;);
  22.     dbg!(&amp;types);
  23.     match quick_xml::se::to_string(&amp;types) {
  24.         Ok(xml) =&gt; {
  25.             dbg!(xml);
  26.         }
  27.         Err(error) =&gt; {
  28.             dbg!(error);
  29.         }
  30.     };
  31. }

huangapple
  • 本文由 发表于 2023年6月22日 03:37:05
  • 转载请务必保留本文链接：https://go.coder-hub.com/76526592.html
  • rust
  • serde
  • xml
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