我是烧瓶 api 编程的新手答案

【问题标题】：I'm new to flask api programming我是烧瓶 api 编程的新手
【发布时间】：2020-07-14 06:20:40
【问题描述】：

我的代码有问题，没有出现错误，但由于某种原因，我没有得到想要的结果结果

这是用户将收到的“json”数据

books = [
  {'id': 0,
   'title': 'A fire Upon the Deep',
   'author': 'Vernor Vinge',
   'first_sentence': 'The coldsleep itself was dreamless.',
   'year_published': '1992'},
  {'id': 1,
   'title': 'The Ones Who Walk Away From Omelas',
   'author': 'Ursula K. Le Guin',
   'first_sentence': 'With a clamor of bells that set the swallows soaring, the \
    Festival of Summer came to the city Omelas, bright-towered by the sea.',
   'published': '1973'},
  {'id': 2,
   'title': 'Dhalgren',
   'author': 'Samuel R. Delany',
   'first_sentence': 'to wound the autumnal city.',
   'published': '1975'}
 ]

如果不存在 id，那么它会返回一条错误消息，因为每本书都有一个 id，所以它不应该看到该消息

@app.route('/api/v1/resource/books', methods=['GET'])
def api_id():
    if 'id' in request.args:
        id = int(request.args['id'])
    else:
        return "Error: ID not provided. Please specify an ID"

    results = []

    for book in books:
        if book['id'] == id:
            results.append(book)

return jsonify(results)

【问题讨论】：

标签： json python-3.x api dictionary

【解决方案1】：

也许，请求 url 类似于 http://localhost:5000/api/v1/resource/books/?id=1

对于多个书籍 ID，它将类似于 http://localhost:5000/api/v1/resource/books/?id=1&id=2

from flask import Flask, request, jsonify

app = Flask(__name__)

books = [
  {'id': 0,
   'title': 'A fire Upon the Deep',
   'author': 'Vernor Vinge',
   'first_sentence': 'The coldsleep itself was dreamless.',
   'year_published': '1992'},
  {'id': 1,
   'title': 'The Ones Who Walk Away From Omelas',
   'author': 'Ursula K. Le Guin',
   'first_sentence': 'With a clamor of bells that set the swallows soaring, the \
    Festival of Summer came to the city Omelas, bright-towered by the sea.',
   'published': '1973'},
  {'id': 2,
   'title': 'Dhalgren',
   'author': 'Samuel R. Delany',
   'first_sentence': 'to wound the autumnal city.',
   'published': '1975'}
 ]
   
@app.route("/api/v1/resource/books/", methods=["GET"])
def api_id():

    # This will look for 'id' in the url. If there's no id/ids, it will take None as default value
    bids = request.args.getlist('id')
    # if you are expecting to serve only one id at a time, use >> request.args.get('id')

    if bids:
        results = []
        for book in books:
            for bid in bids: # this for loop won't be required for strictly single id
                if book['id'] == int(bid):
                    results.append(book)
        return jsonify(results)
    else:
        return "Error: ID not provided. Please specify an ID"

if __name__ == "__main__":
    app.run()

此代码对我有用。我希望它也适合你。

请求网址：

http://localhost:5000/api/v1/resource/books/?id=0&id=2

输出：

[{"author":"Vernor Vinge","first_sentence":"The coldsleep itself was dreamless.","id":0,"title":"A fire Upon the Deep","year_published":"1992"},{"author":"Samuel R. Delany","first_sentence":"to wound the autumnal city.","id":2,"published":"1975","title":"Dhalgren"}]

请求网址：

http://localhost:5000/api/v1/resource/books/?id=0

输出：

[{"author":"Vernor Vinge","first_sentence":"The coldsleep itself was dreamless.","id":0,"title":"A fire Upon the Deep","year_published":"1992"}]

请求网址：

http://localhost:5000/api/v1/resource/books/

输出：

Error: ID not provided. Please specify an ID

【讨论】：