[英]Getting data from the session[] Python, Flask
I'm trying to make simple cart system to the online shop using Python and framework - Flask.我正在尝试使用 Python 和框架 - Flask 为在线商店制作简单的购物车系统。 I'm getting data from form in products.html then writing it into the session.我从 products.html 的表格中获取数据,然后将其写入 session。 I have a problem with getting this data and returning it to the cart.html - I'm get just clear page instead of names of the products i added to the cart.我在获取此数据并将其返回到购物车时遇到问题。html - 我得到的只是清晰的页面,而不是我添加到购物车的产品名称。
products.html产品.html
{% for el in products %}
<p>Name {{ el.product_name }}</p>
<p>Description {{ el.product_description }}</p>
<p>Image </p> <img width="200" height="200" src="data:;base64,{{ el.product_img }}">
<p>Cost: {{ el.product_cost }} тенге.</p>
<form method="post" action="/cart">
<input type="hidden" name="cart_prod_name" value="{{ el.product_name }}">
<input type="submit" value="Add to cart">
</form>
{% endfor %}
Python function cart()
: Python function cart()
:
@app.route('/cart', methods=['POST', 'GET'])
def cart():
if 'cart' not in session:
session['cart'] = []
if request.method == 'POST':
cart_prod_name = request.form['cart_prod_name']
session['cart'] += cart_prod_name
return redirect('/cart')
if request.method == 'GET':
cart_products = session['cart']
return render_template('cart.html', cart_products=cart_products)
cart.html:购物车.html:
{% for cart_product in cart_products %}
<p>{{ cart_product.order_prod_name }}</p>
{% endfor %}
From flask.session
docs:来自flask.session
文档:
Be advised that modifications on mutable structures are not picked up automatically, in that situation you have to explicitly set the attribute to True yourself.请注意,对可变结构的修改不会自动拾取,在这种情况下,您必须自己将属性显式设置为 True。
your carts holder object is a mutable structure == list so you have to set after changes您的购物车架 object 是一个可变结构 == 列表,因此您必须在更改后进行设置
session.modified = True
I sloved that problem.我解决了这个问题。 Exactly I needed to iterate cart_product
in cart_roducts
and output cart_product
and don't call it to output order_prod_name
.正是我需要在cart_roducts
和 output cart_product
cart_product
不要将它调用到 output order_prod_name
。
Fixed cart.html
:固定cart.html
:
{% for cart_product in cart_products %}
<p>{{ cart_product }}</p>
{% endfor %}
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