使用Python调用Redmine REST API提交工单返回422错误如何解决

错误根因如下： #

• 未指定请求的Content-Type为application/json，Redmine无法识别传入的JSON结构，会判定所有业务字段为空
• JSON配置中存在拼写错误：projet_id字段拼写错误，正确应为project_id，导致Redmine无法读取到项目ID关联信息
• 新增场景下无需传入id字段：id是Redmine创建issue时自动生成的系统字段，主动提交会触发逻辑冲突。如果你的需求是更新已有的ID为2的issue，需要将请求方法改为PUT，请求地址替换为http://localhost:3000/issues/2.json

修正后代码示例 #

import requests
import json

username = "x"
password = "x"

# 新建issue用该地址
url = "http://localhost:3000/issues.json"
# 若为更新ID为2的issue，替换为下面的地址，后续请求方法改为put
# url = "http://localhost:3000/issues/2.json"

with open('rest.json', 'r', encoding='utf-8') as f:
    issue_data = json.load(f)

headers = {
    "Content-Type": "application/json"
}

# 新建场景用post
response = requests.post(
    url,
    auth=(username, password),
    json=issue_data,
    headers=headers
)
# 更新场景用put
# response = requests.put(
#     url,
#     auth=(username, password),
#     json=issue_data,
#     headers=headers
# )

print(response.status_code)
print(response.text)

修正后JSON配置（新建issue场景） #

{
    "issue" : {
        "project_id" : 1,
        "tracker_id" : 1,
        "priority_id" :1,
        "status_id" : 1,
        "author_id" : 1,
        "subject" : "Subject changed",
        "description": "The subject was changed",
        "category_id" :1,
        "assigned_to_id" : 1        
    }
}

内容的提问来源于stack exchange，提问作者Ōkami