Unsure how to compute a particular value to be displayed (Python/Django)

1

So basically in my store, every item has a specific weight and once the customer adds whatever they want and go to checkout, they can see every single order of theirs along with the name information and weight. I want to also add the total weight of all the items together. Currently, it displays only the weight of each particular item.

For example

Item A is 2 Kg and item B is 3 kg

If customer adds 2 item A and 3 Item B

It displays Item: A quantity: 2 Weight : 4kg

Item: B quantity: 3 Weight: 9kg.

I want to also add Total weight : 13 kg

This is my views.py

    def checkout(request):

        try:

            current_order = Order.objects.filter(owner=1).get(status="pre-place")

        except Order.DoesNotExist:

            return HttpResponse("Your current order is empty<br><a href="browse">Go back</a>")

        else:

            total_weight = 0

            items = OrderDetail.objects.filter(orderID=current_order)

            template_name = 'store/checkout.html'

            order_details = 

            for item in items:

                weight = item.supplyID.weight * item.quantity

                order_details.append((item, weight))

            return render(request, template_name, {'order_details': order_details, 'current_order': current_order})

This is my template

<h1>Your current order</h1>

    <a href="{% url 'Store:browse' %}">return to selecting 

 supplies</a><br><br>

    <table>

        <tr><th>name</th><th>item weight(kg)</th><th>qty</th><th>total 

 weight(kg)</th></tr>

        {% for order_detail, weight in order_details %}

            <tr>

                <td>{{ order_detail.supplyID.name }}</td>

                <td>{{ order_detail.supplyID.weight }}</td>

                <td>{{ order_detail.quantity }}</td>

                <td>{{ weight }}</td>

            </tr>



        {% endfor %}

    </table>

python django

share|improve this question

asked Nov 19 '18 at 16:42

Nayo xx

62

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  You defined a total_weight variable but didn't use it; why don't you add each weight to it within the for loop, then send that variable to the template?
  – Daniel Roseman
  Nov 19 '18 at 16:46
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Danel Roseman I'm not sure how to go about computing it. would for item in items: total_weight = total_weight + item.supplyID.weight * item.quantity work? As I did the same and then I tried adding <p>{{total_weight}}</p> and it didn't seem to work
  – Nayo xx
  Nov 19 '18 at 16:49
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  But you already calculated weight for each iteration. Just do total_weight += weight inside that loop. And don't forget to add it to the template context in your render call.
  – Daniel Roseman
  Nov 19 '18 at 16:51
  
  
  

  
  
  
  

add a comment | 

1

So basically in my store, every item has a specific weight and once the customer adds whatever they want and go to checkout, they can see every single order of theirs along with the name information and weight. I want to also add the total weight of all the items together. Currently, it displays only the weight of each particular item.

For example

Item A is 2 Kg and item B is 3 kg

If customer adds 2 item A and 3 Item B

It displays Item: A quantity: 2 Weight : 4kg

Item: B quantity: 3 Weight: 9kg.

I want to also add Total weight : 13 kg

This is my views.py

    def checkout(request):

        try:

            current_order = Order.objects.filter(owner=1).get(status="pre-place")

        except Order.DoesNotExist:

            return HttpResponse("Your current order is empty<br><a href="browse">Go back</a>")

        else:

            total_weight = 0

            items = OrderDetail.objects.filter(orderID=current_order)

            template_name = 'store/checkout.html'

            order_details = 

            for item in items:

                weight = item.supplyID.weight * item.quantity

                order_details.append((item, weight))

            return render(request, template_name, {'order_details': order_details, 'current_order': current_order})

This is my template

<h1>Your current order</h1>

    <a href="{% url 'Store:browse' %}">return to selecting 

 supplies</a><br><br>

    <table>

        <tr><th>name</th><th>item weight(kg)</th><th>qty</th><th>total 

 weight(kg)</th></tr>

        {% for order_detail, weight in order_details %}

            <tr>

                <td>{{ order_detail.supplyID.name }}</td>

                <td>{{ order_detail.supplyID.weight }}</td>

                <td>{{ order_detail.quantity }}</td>

                <td>{{ weight }}</td>

            </tr>



        {% endfor %}

    </table>

python django

share|improve this question

asked Nov 19 '18 at 16:42

Nayo xx

62

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  You defined a total_weight variable but didn't use it; why don't you add each weight to it within the for loop, then send that variable to the template?
  – Daniel Roseman
  Nov 19 '18 at 16:46
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Danel Roseman I'm not sure how to go about computing it. would for item in items: total_weight = total_weight + item.supplyID.weight * item.quantity work? As I did the same and then I tried adding <p>{{total_weight}}</p> and it didn't seem to work
  – Nayo xx
  Nov 19 '18 at 16:49
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  But you already calculated weight for each iteration. Just do total_weight += weight inside that loop. And don't forget to add it to the template context in your render call.
  – Daniel Roseman
  Nov 19 '18 at 16:51
  
  
  

  
  
  
  

add a comment | 

1

1

1

So basically in my store, every item has a specific weight and once the customer adds whatever they want and go to checkout, they can see every single order of theirs along with the name information and weight. I want to also add the total weight of all the items together. Currently, it displays only the weight of each particular item.

For example

Item A is 2 Kg and item B is 3 kg

If customer adds 2 item A and 3 Item B

It displays Item: A quantity: 2 Weight : 4kg

Item: B quantity: 3 Weight: 9kg.

I want to also add Total weight : 13 kg

This is my views.py

    def checkout(request):

        try:

            current_order = Order.objects.filter(owner=1).get(status="pre-place")

        except Order.DoesNotExist:

            return HttpResponse("Your current order is empty<br><a href="browse">Go back</a>")

        else:

            total_weight = 0

            items = OrderDetail.objects.filter(orderID=current_order)

            template_name = 'store/checkout.html'

            order_details = 

            for item in items:

                weight = item.supplyID.weight * item.quantity

                order_details.append((item, weight))

            return render(request, template_name, {'order_details': order_details, 'current_order': current_order})

This is my template

<h1>Your current order</h1>

    <a href="{% url 'Store:browse' %}">return to selecting 

 supplies</a><br><br>

    <table>

        <tr><th>name</th><th>item weight(kg)</th><th>qty</th><th>total 

 weight(kg)</th></tr>

        {% for order_detail, weight in order_details %}

            <tr>

                <td>{{ order_detail.supplyID.name }}</td>

                <td>{{ order_detail.supplyID.weight }}</td>

                <td>{{ order_detail.quantity }}</td>

                <td>{{ weight }}</td>

            </tr>



        {% endfor %}

    </table>

python django

share|improve this question

asked Nov 19 '18 at 16:42

Nayo xx

62

So basically in my store, every item has a specific weight and once the customer adds whatever they want and go to checkout, they can see every single order of theirs along with the name information and weight. I want to also add the total weight of all the items together. Currently, it displays only the weight of each particular item.

For example

Item A is 2 Kg and item B is 3 kg

If customer adds 2 item A and 3 Item B

It displays Item: A quantity: 2 Weight : 4kg

Item: B quantity: 3 Weight: 9kg.

I want to also add Total weight : 13 kg

This is my views.py

    def checkout(request):

        try:

            current_order = Order.objects.filter(owner=1).get(status="pre-place")

        except Order.DoesNotExist:

            return HttpResponse("Your current order is empty<br><a href="browse">Go back</a>")

        else:

            total_weight = 0

            items = OrderDetail.objects.filter(orderID=current_order)

            template_name = 'store/checkout.html'

            order_details = 

            for item in items:

                weight = item.supplyID.weight * item.quantity

                order_details.append((item, weight))

            return render(request, template_name, {'order_details': order_details, 'current_order': current_order})

This is my template

<h1>Your current order</h1>

    <a href="{% url 'Store:browse' %}">return to selecting 

 supplies</a><br><br>

    <table>

        <tr><th>name</th><th>item weight(kg)</th><th>qty</th><th>total 

 weight(kg)</th></tr>

        {% for order_detail, weight in order_details %}

            <tr>

                <td>{{ order_detail.supplyID.name }}</td>

                <td>{{ order_detail.supplyID.weight }}</td>

                <td>{{ order_detail.quantity }}</td>

                <td>{{ weight }}</td>

            </tr>



        {% endfor %}

    </table>

python django

python django

share|improve this question

asked Nov 19 '18 at 16:42

Nayo xx

62

share|improve this question

asked Nov 19 '18 at 16:42

Nayo xx

62

share|improve this question

share|improve this question

asked Nov 19 '18 at 16:42

Nayo xx

62

asked Nov 19 '18 at 16:42

Nayo xx

62

asked Nov 19 '18 at 16:42

Nayo xx

62

62

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  You defined a total_weight variable but didn't use it; why don't you add each weight to it within the for loop, then send that variable to the template?
  – Daniel Roseman
  Nov 19 '18 at 16:46
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Danel Roseman I'm not sure how to go about computing it. would for item in items: total_weight = total_weight + item.supplyID.weight * item.quantity work? As I did the same and then I tried adding <p>{{total_weight}}</p> and it didn't seem to work
  – Nayo xx
  Nov 19 '18 at 16:49
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  But you already calculated weight for each iteration. Just do total_weight += weight inside that loop. And don't forget to add it to the template context in your render call.
  – Daniel Roseman
  Nov 19 '18 at 16:51
  
  
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  You defined a total_weight variable but didn't use it; why don't you add each weight to it within the for loop, then send that variable to the template?
  – Daniel Roseman
  Nov 19 '18 at 16:46
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  @Danel Roseman I'm not sure how to go about computing it. would for item in items: total_weight = total_weight + item.supplyID.weight * item.quantity work? As I did the same and then I tried adding <p>{{total_weight}}</p> and it didn't seem to work
  – Nayo xx
  Nov 19 '18 at 16:49
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  But you already calculated weight for each iteration. Just do total_weight += weight inside that loop. And don't forget to add it to the template context in your render call.
  – Daniel Roseman
  Nov 19 '18 at 16:51
  
  
  

  
  
  
  

2

2

You defined a total_weight variable but didn't use it; why don't you add each weight to it within the for loop, then send that variable to the template?
– Daniel Roseman
Nov 19 '18 at 16:46

You defined a total_weight variable but didn't use it; why don't you add each weight to it within the for loop, then send that variable to the template?
– Daniel Roseman
Nov 19 '18 at 16:46

@Danel Roseman I'm not sure how to go about computing it. would for item in items: total_weight = total_weight + item.supplyID.weight * item.quantity work? As I did the same and then I tried adding <p>{{total_weight}}</p> and it didn't seem to work
– Nayo xx
Nov 19 '18 at 16:49

@Danel Roseman I'm not sure how to go about computing it. would for item in items: total_weight = total_weight + item.supplyID.weight * item.quantity work? As I did the same and then I tried adding <p>{{total_weight}}</p> and it didn't seem to work
– Nayo xx
Nov 19 '18 at 16:49

But you already calculated weight for each iteration. Just do total_weight += weight inside that loop. And don't forget to add it to the template context in your render call.
– Daniel Roseman
Nov 19 '18 at 16:51

But you already calculated weight for each iteration. Just do total_weight += weight inside that loop. And don't forget to add it to the template context in your render call.
– Daniel Roseman
Nov 19 '18 at 16:51

add a comment | 

2 Answers
2

active

oldest

votes

0

Documentation

The context variable passed to render just has to be a dictionary , so you can do your computation of the Total Weight in views.py, place this value in the dictionary and then grab the value of the Total Weight key in your template.

For example:

def checkout(request):

    try:

        current_order = Order.objects.filter(owner=1).get(status="pre-place")

    except Order.DoesNotExist:

        return HttpResponse("Your current order is empty<br><a href="browse">Go back</a>")

    else:

        total_weight = 0

        items = OrderDetail.objects.filter(orderID=current_order)

        template_name = 'store/checkout.html'

        order_details = 

        for item in items:

            weight = item.supplyID.weight * item.quantity

            order_details.append((item, weight))

            total_weight +=weight

        return render(request, template_name, {'order_details': order_details, 'current_order': current_order, 'Total Weight' : total_weight})

Then just use that variable in your template:

<h1>Your current order</h1>

<a href="{% url 'Store:browse' %}">return to selecting supplies</a><br><br>

<table>

    <tr>

        <th>name</th><th>item weight(kg)</th><th>qty</th><th>total weight(kg)</th>

    </tr>

    {% for order_detail, weight in order_details %}

        <tr>

            <td>{{ order_detail.supplyID.name }}</td>

            <td>{{ order_detail.supplyID.weight }}</td>

            <td>{{ order_detail.quantity }}</td>

            <td>{{ weight }}</td>

        </tr>

    {% endfor %}

</table>

<p>The total weight of your order is:</p>

<p>{{Total Weight}}</p>

share|improve this answer

answered Nov 19 '18 at 17:04

Michael King

262

add a comment | 

0

First, you should understand the difference between get() and filter(). Take a look at this.

After that we can make some changes:

def checkout(request):

    try:

        current_order = Order.objects.filter(owner__exact=1, status__icontains ="pre-place") # exact returns exact match, icontains(could have been iexact too if you want exact match) return not case sensitive match.

    except Order.DoesNotExist:

        return HttpResponse("Your current order is empty<br><a href="browse">Go back</a>")

    else:

        items = OrderDetail.objects.filter(orderID__exact=current_order) #since it is id no need for iexact which is case insensitive.

        order_details = {} # it is always suggestible to use dictionary instead of turple for easiness.

        for item in items:

            weight = item.supplyID.weight * item.quantity

            order_details[item] = weight



        total_weight = sum(order_detail.values()) #sum of total weight



        context = { #clear to read and maintain

            'order_details': order_details,

            'current_order': current_order,

            'total_weight': total_weight

                                          }



        return render(request, 

                              'store/checkout.html', # i don't find storing url usefull

                                            context=context)

This is your template:

<h1>Your current order</h1>

    <a href="{% url 'Store:browse' %}">return to selecting 

 supplies</a><br><br>

    <table>

        <tr><th>name</th><th>item weight(kg)</th><th>qty</th><th>total 

 weight(kg)</th></tr>

        {% for item, weight in order_details.items() %}

            <tr>

                <td>{{ item.supplyID.name }}</td>

                <td>{{ item.supplyID.weight }}</td>

                <td>{{ item.quantity }}</td>

                <td>{{ weight }}</td>

            </tr>



        {% endfor %}

    </table>

share|improve this answer

edited Nov 19 '18 at 17:24

answered Nov 19 '18 at 17:15

Rarblack

2,7293925

add a comment | 

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

active

oldest

votes

active

oldest

votes

0

Documentation

The context variable passed to render just has to be a dictionary , so you can do your computation of the Total Weight in views.py, place this value in the dictionary and then grab the value of the Total Weight key in your template.

For example:

def checkout(request):

    try:

        current_order = Order.objects.filter(owner=1).get(status="pre-place")

    except Order.DoesNotExist:

        return HttpResponse("Your current order is empty<br><a href="browse">Go back</a>")

    else:

        total_weight = 0

        items = OrderDetail.objects.filter(orderID=current_order)

        template_name = 'store/checkout.html'

        order_details = 

        for item in items:

            weight = item.supplyID.weight * item.quantity

            order_details.append((item, weight))

            total_weight +=weight

        return render(request, template_name, {'order_details': order_details, 'current_order': current_order, 'Total Weight' : total_weight})

Then just use that variable in your template:

<h1>Your current order</h1>

<a href="{% url 'Store:browse' %}">return to selecting supplies</a><br><br>

<table>

    <tr>

        <th>name</th><th>item weight(kg)</th><th>qty</th><th>total weight(kg)</th>

    </tr>

    {% for order_detail, weight in order_details %}

        <tr>

            <td>{{ order_detail.supplyID.name }}</td>

            <td>{{ order_detail.supplyID.weight }}</td>

            <td>{{ order_detail.quantity }}</td>

            <td>{{ weight }}</td>

        </tr>

    {% endfor %}

</table>

<p>The total weight of your order is:</p>

<p>{{Total Weight}}</p>

share|improve this answer

answered Nov 19 '18 at 17:04

Michael King

262

add a comment | 

0

Documentation

The context variable passed to render just has to be a dictionary , so you can do your computation of the Total Weight in views.py, place this value in the dictionary and then grab the value of the Total Weight key in your template.

For example:

def checkout(request):

    try:

        current_order = Order.objects.filter(owner=1).get(status="pre-place")

    except Order.DoesNotExist:

        return HttpResponse("Your current order is empty<br><a href="browse">Go back</a>")

    else:

        total_weight = 0

        items = OrderDetail.objects.filter(orderID=current_order)

        template_name = 'store/checkout.html'

        order_details = 

        for item in items:

            weight = item.supplyID.weight * item.quantity

            order_details.append((item, weight))

            total_weight +=weight

        return render(request, template_name, {'order_details': order_details, 'current_order': current_order, 'Total Weight' : total_weight})

Then just use that variable in your template:

<h1>Your current order</h1>

<a href="{% url 'Store:browse' %}">return to selecting supplies</a><br><br>

<table>

    <tr>

        <th>name</th><th>item weight(kg)</th><th>qty</th><th>total weight(kg)</th>

    </tr>

    {% for order_detail, weight in order_details %}

        <tr>

            <td>{{ order_detail.supplyID.name }}</td>

            <td>{{ order_detail.supplyID.weight }}</td>

            <td>{{ order_detail.quantity }}</td>

            <td>{{ weight }}</td>

        </tr>

    {% endfor %}

</table>

<p>The total weight of your order is:</p>

<p>{{Total Weight}}</p>

share|improve this answer

answered Nov 19 '18 at 17:04

Michael King

262

add a comment | 

0

0

0

Documentation

The context variable passed to render just has to be a dictionary , so you can do your computation of the Total Weight in views.py, place this value in the dictionary and then grab the value of the Total Weight key in your template.

For example:

def checkout(request):

    try:

        current_order = Order.objects.filter(owner=1).get(status="pre-place")

    except Order.DoesNotExist:

        return HttpResponse("Your current order is empty<br><a href="browse">Go back</a>")

    else:

        total_weight = 0

        items = OrderDetail.objects.filter(orderID=current_order)

        template_name = 'store/checkout.html'

        order_details = 

        for item in items:

            weight = item.supplyID.weight * item.quantity

            order_details.append((item, weight))

            total_weight +=weight

        return render(request, template_name, {'order_details': order_details, 'current_order': current_order, 'Total Weight' : total_weight})

Then just use that variable in your template:

<h1>Your current order</h1>

<a href="{% url 'Store:browse' %}">return to selecting supplies</a><br><br>

<table>

    <tr>

        <th>name</th><th>item weight(kg)</th><th>qty</th><th>total weight(kg)</th>

    </tr>

    {% for order_detail, weight in order_details %}

        <tr>

            <td>{{ order_detail.supplyID.name }}</td>

            <td>{{ order_detail.supplyID.weight }}</td>

            <td>{{ order_detail.quantity }}</td>

            <td>{{ weight }}</td>

        </tr>

    {% endfor %}

</table>

<p>The total weight of your order is:</p>

<p>{{Total Weight}}</p>

share|improve this answer

answered Nov 19 '18 at 17:04

Michael King

262

Documentation

The context variable passed to render just has to be a dictionary , so you can do your computation of the Total Weight in views.py, place this value in the dictionary and then grab the value of the Total Weight key in your template.

For example:

def checkout(request):

    try:

        current_order = Order.objects.filter(owner=1).get(status="pre-place")

    except Order.DoesNotExist:

        return HttpResponse("Your current order is empty<br><a href="browse">Go back</a>")

    else:

        total_weight = 0

        items = OrderDetail.objects.filter(orderID=current_order)

        template_name = 'store/checkout.html'

        order_details = 

        for item in items:

            weight = item.supplyID.weight * item.quantity

            order_details.append((item, weight))

            total_weight +=weight

        return render(request, template_name, {'order_details': order_details, 'current_order': current_order, 'Total Weight' : total_weight})

Then just use that variable in your template:

<h1>Your current order</h1>

<a href="{% url 'Store:browse' %}">return to selecting supplies</a><br><br>

<table>

    <tr>

        <th>name</th><th>item weight(kg)</th><th>qty</th><th>total weight(kg)</th>

    </tr>

    {% for order_detail, weight in order_details %}

        <tr>

            <td>{{ order_detail.supplyID.name }}</td>

            <td>{{ order_detail.supplyID.weight }}</td>

            <td>{{ order_detail.quantity }}</td>

            <td>{{ weight }}</td>

        </tr>

    {% endfor %}

</table>

<p>The total weight of your order is:</p>

<p>{{Total Weight}}</p>

share|improve this answer

answered Nov 19 '18 at 17:04

Michael King

262

share|improve this answer

share|improve this answer

answered Nov 19 '18 at 17:04

Michael King

262

answered Nov 19 '18 at 17:04

Michael King

262

answered Nov 19 '18 at 17:04

Michael King

262

262

add a comment | 

add a comment | 

0

First, you should understand the difference between get() and filter(). Take a look at this.

After that we can make some changes:

def checkout(request):

    try:

        current_order = Order.objects.filter(owner__exact=1, status__icontains ="pre-place") # exact returns exact match, icontains(could have been iexact too if you want exact match) return not case sensitive match.

    except Order.DoesNotExist:

        return HttpResponse("Your current order is empty<br><a href="browse">Go back</a>")

    else:

        items = OrderDetail.objects.filter(orderID__exact=current_order) #since it is id no need for iexact which is case insensitive.

        order_details = {} # it is always suggestible to use dictionary instead of turple for easiness.

        for item in items:

            weight = item.supplyID.weight * item.quantity

            order_details[item] = weight



        total_weight = sum(order_detail.values()) #sum of total weight



        context = { #clear to read and maintain

            'order_details': order_details,

            'current_order': current_order,

            'total_weight': total_weight

                                          }



        return render(request, 

                              'store/checkout.html', # i don't find storing url usefull

                                            context=context)

This is your template:

<h1>Your current order</h1>

    <a href="{% url 'Store:browse' %}">return to selecting 

 supplies</a><br><br>

    <table>

        <tr><th>name</th><th>item weight(kg)</th><th>qty</th><th>total 

 weight(kg)</th></tr>

        {% for item, weight in order_details.items() %}

            <tr>

                <td>{{ item.supplyID.name }}</td>

                <td>{{ item.supplyID.weight }}</td>

                <td>{{ item.quantity }}</td>

                <td>{{ weight }}</td>

            </tr>



        {% endfor %}

    </table>

share|improve this answer

edited Nov 19 '18 at 17:24

answered Nov 19 '18 at 17:15

Rarblack

2,7293925

add a comment | 

0

First, you should understand the difference between get() and filter(). Take a look at this.

After that we can make some changes:

def checkout(request):

    try:

        current_order = Order.objects.filter(owner__exact=1, status__icontains ="pre-place") # exact returns exact match, icontains(could have been iexact too if you want exact match) return not case sensitive match.

    except Order.DoesNotExist:

        return HttpResponse("Your current order is empty<br><a href="browse">Go back</a>")

    else:

        items = OrderDetail.objects.filter(orderID__exact=current_order) #since it is id no need for iexact which is case insensitive.

        order_details = {} # it is always suggestible to use dictionary instead of turple for easiness.

        for item in items:

            weight = item.supplyID.weight * item.quantity

            order_details[item] = weight



        total_weight = sum(order_detail.values()) #sum of total weight



        context = { #clear to read and maintain

            'order_details': order_details,

            'current_order': current_order,

            'total_weight': total_weight

                                          }



        return render(request, 

                              'store/checkout.html', # i don't find storing url usefull

                                            context=context)

This is your template:

<h1>Your current order</h1>

    <a href="{% url 'Store:browse' %}">return to selecting 

 supplies</a><br><br>

    <table>

        <tr><th>name</th><th>item weight(kg)</th><th>qty</th><th>total 

 weight(kg)</th></tr>

        {% for item, weight in order_details.items() %}

            <tr>

                <td>{{ item.supplyID.name }}</td>

                <td>{{ item.supplyID.weight }}</td>

                <td>{{ item.quantity }}</td>

                <td>{{ weight }}</td>

            </tr>



        {% endfor %}

    </table>

share|improve this answer

edited Nov 19 '18 at 17:24

answered Nov 19 '18 at 17:15

Rarblack

2,7293925

add a comment | 

0

0

0

First, you should understand the difference between get() and filter(). Take a look at this.

After that we can make some changes:

def checkout(request):

    try:

        current_order = Order.objects.filter(owner__exact=1, status__icontains ="pre-place") # exact returns exact match, icontains(could have been iexact too if you want exact match) return not case sensitive match.

    except Order.DoesNotExist:

        return HttpResponse("Your current order is empty<br><a href="browse">Go back</a>")

    else:

        items = OrderDetail.objects.filter(orderID__exact=current_order) #since it is id no need for iexact which is case insensitive.

        order_details = {} # it is always suggestible to use dictionary instead of turple for easiness.

        for item in items:

            weight = item.supplyID.weight * item.quantity

            order_details[item] = weight



        total_weight = sum(order_detail.values()) #sum of total weight



        context = { #clear to read and maintain

            'order_details': order_details,

            'current_order': current_order,

            'total_weight': total_weight

                                          }



        return render(request, 

                              'store/checkout.html', # i don't find storing url usefull

                                            context=context)

This is your template:

<h1>Your current order</h1>

    <a href="{% url 'Store:browse' %}">return to selecting 

 supplies</a><br><br>

    <table>

        <tr><th>name</th><th>item weight(kg)</th><th>qty</th><th>total 

 weight(kg)</th></tr>

        {% for item, weight in order_details.items() %}

            <tr>

                <td>{{ item.supplyID.name }}</td>

                <td>{{ item.supplyID.weight }}</td>

                <td>{{ item.quantity }}</td>

                <td>{{ weight }}</td>

            </tr>



        {% endfor %}

    </table>

share|improve this answer

edited Nov 19 '18 at 17:24

answered Nov 19 '18 at 17:15

Rarblack

2,7293925

First, you should understand the difference between get() and filter(). Take a look at this.

After that we can make some changes:

def checkout(request):

    try:

        current_order = Order.objects.filter(owner__exact=1, status__icontains ="pre-place") # exact returns exact match, icontains(could have been iexact too if you want exact match) return not case sensitive match.

    except Order.DoesNotExist:

        return HttpResponse("Your current order is empty<br><a href="browse">Go back</a>")

    else:

        items = OrderDetail.objects.filter(orderID__exact=current_order) #since it is id no need for iexact which is case insensitive.

        order_details = {} # it is always suggestible to use dictionary instead of turple for easiness.

        for item in items:

            weight = item.supplyID.weight * item.quantity

            order_details[item] = weight



        total_weight = sum(order_detail.values()) #sum of total weight



        context = { #clear to read and maintain

            'order_details': order_details,

            'current_order': current_order,

            'total_weight': total_weight

                                          }



        return render(request, 

                              'store/checkout.html', # i don't find storing url usefull

                                            context=context)

This is your template:

<h1>Your current order</h1>

    <a href="{% url 'Store:browse' %}">return to selecting 

 supplies</a><br><br>

    <table>

        <tr><th>name</th><th>item weight(kg)</th><th>qty</th><th>total 

 weight(kg)</th></tr>

        {% for item, weight in order_details.items() %}

            <tr>

                <td>{{ item.supplyID.name }}</td>

                <td>{{ item.supplyID.weight }}</td>

                <td>{{ item.quantity }}</td>

                <td>{{ weight }}</td>

            </tr>



        {% endfor %}

    </table>

share|improve this answer

edited Nov 19 '18 at 17:24

answered Nov 19 '18 at 17:15

Rarblack

2,7293925

share|improve this answer

share|improve this answer

edited Nov 19 '18 at 17:24

edited Nov 19 '18 at 17:24

edited Nov 19 '18 at 17:24

answered Nov 19 '18 at 17:15

Rarblack

2,7293925

answered Nov 19 '18 at 17:15

Rarblack

2,7293925

answered Nov 19 '18 at 17:15

Rarblack

2,7293925

2,7293925

add a comment | 

add a comment | 

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