如何在 RUST 中反序列化复杂 JSON 的某些字段

Question

我想提取有关 json 字符串的一些信息，但当我尝试这样做时遇到一些问题。

这是我的json格式字符串的样式：

{
    "id": "my_id",
    "field1": {
        "value": true,
        "test": true
    },
    "target": {
        "value1": "value",
        "value2": 0,
        "value3": true,
        "test": false
    },
    "field2": [
        "value"
    ],
    "files": [
        "this/is/my/path"
    ]
}
{
    "id": "my_id",
    "field1": {
        "value": true,
        "test": true
    },
    "target": {
        "value1": "value",
        "value2": 30,
        "value3": false,
        "test": false
    },
    "field2": [
        "value"
    ],
    "files": [
        "this/is/my/path"
    ]
}
{
    "id": "my_id",
    "field1": {
        "value": true,
        "test": true
    },
    "target": {
        "value1": "value",
        "value2": 10,
        "value3": true,
        "test": true
    },
    "field2": [
        "value"
    ],
    "files": [
        "this/is/my/path"
    ]
}

对于每个对象，我想提取目标和文件路径中的测试字段。

为此我尝试：

#[derive(Debug, Serialize, Deserialize)]
struct AllFiles {
    target: Target,
    files: Vec<String>
}

#[derive(Debug, Serialize, Deserialize)]
struct Target {
    test: bool
}

fn main() {
   let json = "JSON string above ^^^";
   let all_files: Vec<AllFiles> = serde_json::from_str(json).unwrap();
}

但是我有这个错误：

Error("invalid type: map, expected a sequence", line: 1, column: 0)'

我不知道如何管理它。 最后我想要 Vec，这样我就可以浏览它并测试它的每个对象

谁能帮我解决这个问题吗？

Answer 1

我尝试在 Rust Playground 上重现您的问题，并且此代码运行正确。我假设您的数据包含在一个数组中，并且我还更改了路径字符串以在末尾包含一个数字，以便更好地可视化结果。你可以试试这里

use serde::{Serialize, Deserialize};

#[derive(Debug, Serialize, Deserialize)]
struct AllFiles {
    target: Target,
    files: Vec<String>
}

#[derive(Debug, Serialize, Deserialize)]
struct Target {
    test: bool
}

fn main() {
   let json = r#"[
   {
        "id": "my_id",
        "field1": {
            "value": true,
            "test": true
        },
        "target": {
            "value1": "value",
            "value2": 0,
            "value3": true,
            "test": false
        },
        "field2": [
            "value"
        ],
        "files": [
            "this/is/my/path1"
        ]
    },
    {
        "id": "my_id",
        "field1": {
            "value": true,
            "test": true
        },
        "target": {
            "value1": "value",
            "value2": 0,
            "value3": true,
            "test": false
        },
        "field2": [
            "value"
        ],
        "files": [
            "this/is/my/path2"
        ]
    },
    {
        "id": "my_id",
        "field1": {
            "value": true,
            "test": true
        },
        "target": {
            "value1": "value",
            "value2": 10,
            "value3": true,
            "test": true
        },
        "field2": [
            "value"
        ],
        "files": [
            "this/is/my/path3"
        ]
    }
    ]"#;
   let all_files: Vec<AllFiles> = serde_json::from_str(json).unwrap();
   
   for item in all_files {
       println!("{:?}", item);
   }
}