Я работаю над школьным проектом, в котором мне нужно запрограммировать приложение REST API, которое взаимодействует с базой данных с помощью основных операций POST и DELETE:
Вот мой файл Python Flask:
from flask import Flask, render_template, redirect, url_for, jsonify, request, Response, abort
from flask_bootstrap import Bootstrap
import dbinteraction
app = Flask(__name__)
Bootstrap(app)
@app.route('/')
def hello_world():
return redirect(url_for('index'))
@app.route('/index')
def index():
return render_template('index.html')
@app.route('/allrecipes')
def allrecipes():
return render_template('allrecipes.html')
@app.route('/ingredients')
def ingredients():
return render_template('ingredients.html')
@app.route('/api/v1.0/recipes', methods=['GET'])
def get_recipes():
# init
recipes = []
# get the task list from the db
recipes_list = dbinteraction.getRecipes()
# prepare the task list for jsonify
for item in recipes_list:
recipe = prepare_for_json(item)
recipes.append(recipe)
# return the task data
return jsonify({'recipes': recipes})
@app.route('/api/v1.0/ingredients', methods=['GET'])
def get_ingredients():
# init
ingredients = []
# get the user_ingredients list from the db
ingredients_list = dbinteraction.getIngredients()
# prepare the user_ingredients list for jsonify
for item in ingredients_list:
ingredient = prepare_for_json_ingredient(item)
ingredients.append(ingredient)
# return the ingredients data
return jsonify({'ingredients': ingredients})
@app.route('/api/v1.0/ingredients', methods=['POST'])
def insert_ingredient():
# get the request body
add_request = request.json
# check whether an ingredient is present or not
if (add_request is not None) and ('name' in add_request) and ('quantity' in add_request):
text = add_request['name']
quantity = add_request['quantity']
# insert in the database
dbinteraction.insertIngredients(text, quantity)
return Response(status=201)
# return an error in case of problems
abort(403)
@app.route('/api/v1.0/ingredients/<string:ing_name>', methods=['DELETE'])
def delete_ingredient(ing_name):
# delete the ingredient
ingredient = dbinteraction.removeIngredient(str(ing_name))
return Response(status=200)
def prepare_for_json(item):
"""
Convert the recipe in a dictionary for easing the JSON creation
"""
recipe = dict()
recipe['name'] = item[0]
recipe['link'] = item[1]
recipe['difficulty'] = item[2]
return recipe
def prepare_for_json_ingredient(item):
"""
Convert the ingredient in a dictionary for easing the JSON creation
"""
ingredient = dict()
ingredient['name'] = item[0]
ingredient['quantity'] = item[1]
return ingredient
if __name__ == '__main__':
app.run(debug=True)
Я также запрограммировал и протестировал функции dbinteraction для базы данных, и они отлично работают.Моя проблема в части ингридиентов.html.Я загружаю и вижу страницу, как я хочу, изменяемый список ингредиентов с кнопкой удаления.Но когда я нажимаю на удаление, я получаю Uncaught ReferenceError: (name of the ingredient) is not defined at HTMLAnchorElement.onclick
Это мои html и javascript файлы:
{% extends "bootstrap/base.html" %}
{% block title %}All recipes page{% endblock %}
{% block styles %}
{{super()}}
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.12/css/all.css"
integrity="sha384-G0fIWCsCzJIMAVNQPfjH08cyYaUtMwjJwqiRKxxE/rx96Uroj1BtIQ6MLJuheaO9" crossorigin="anonymous">
{% endblock %}
{% block scripts %}
{{ super() }}
<script src="{{ url_for('static', filename='kima2js.js') }}"></script>
{% endblock %}
{% block content %}
<div class="container" style="text-align: center">
<h1><i class="fas fa-utensils" style=""></i><br>
Insert an ingredient:
</h1>
<div id="ingredients_list" class="form-inline"></div>
<div id="insertingredient">
<form id="addForm"class="form-inline" method="POST">
<div class="form-group">
<label for="ingredientName">Ingredient:</label>
<input type="text" id="ingredientName" class="form-control" name="name"/>
</div>
<div class="form-group">
<label for="ingredientQuantity">Quantity:</label>
<input type="text" id="ingredientQuantity" class="form-control" name="quantity"/>
</div>
<button type="submit" class="btn-sm">Add</button>
</form>
</div>
</div>
{% endblock %}
... javascript:
function addIngredient() {
$("#ingredients_list ul").empty();
$("#ingredientName").val('');
$("#ingredientQuantity").val('');
getIngredients();
}
function getIngredients() {
$.getJSON("http://127.0.0.1:5000/api/v1.0/ingredients", function(data){
var ingredients = data["ingredients"];
var len = ingredients.length;
for(var i = 0 ; i<len ; i++) {
var t = ingredients[i];
$("#ingredients_list ul").append("<li class='list-group-item list-group-item-text'>"+t.name+" "+t.quantity
+" <a class='delete btn btn-default' onclick='deleteIngredient("+ t.name +")'>" +
" <span class='glyphicon glyphicon glyphicon-remove'></span>Delete</a></li>");
}
});
}
function deleteIngredient(ing_name) {
$.ajax("/api/v1.0/ingredients/"+ing_name,
{
method: 'DELETE',
success: function (status) {
// update the list of printed ingredients: called when the DELETE is complete
getIngredients();
}
}
);
}
$(document).ready(function () {
$("#ingredients_list").append("<ul></ul>");
$("#ingredients_list ul").empty();
getIngredients();
$("#addForm").submit( function(){
var name = $("#ingredientName").val();
var quantity = $("#ingredientQuantity").val();
var ingredient = {'name': name, 'quantity': quantity};
var json = JSON.stringify(ingredient);
$.post({
"url": "http://127.0.0.1:5000/api/v1.0/ingredients",
"data": json,
"contentType":"application/json",
"success": addIngredient
});
return false;
});
});
Я не вижу, что я делаю неправильно.Мои единственные предположения о onclick части.Потому что я тестировал отдельно все остальные части кода в предыдущих лабораториях