prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  backoffice: show quantity of products ordered after scanning qr code
  
  backoffice: show quantity of products ordered after scanning qr code
  
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `src/tickets/models.py`
  Content:
  ```
  1 import io
  2 import hashlib
  3 import base64
  4 import qrcode
  5 from django.conf import settings
  6 from django.urls import reverse_lazy
  7 from django.utils.translation import ugettext_lazy as _
  8 
  9 from shop.models import OrderProductRelation
  10 from utils.models import UUIDModel, CampRelatedModel
  11 from utils.pdf import generate_pdf_letter
  12 from django.db import models
  13 import logging
  14 
  15 logger = logging.getLogger("bornhack.%s" % __name__)
  16 
  17 
  18 # TicketType can be full week, one day. etc.
  19 class TicketType(CampRelatedModel, UUIDModel):
  20     name = models.TextField()
  21     camp = models.ForeignKey("camps.Camp", on_delete=models.PROTECT)
  22     includes_badge = models.BooleanField(default=False)
  23     single_ticket_per_product = models.BooleanField(
  24         default=False,
  25         help_text=(
  26             "Only create one ticket for a product/order pair no matter the quantity. "
  27             "Useful for products which are bought in larger quantity (ie. village chairs)"
  28         ),
  29     )
  30 
  31     def __str__(self):
  32         return "{} ({})".format(self.name, self.camp.title)
  33 
  34 
  35 def create_ticket_token(string):
  36     return hashlib.sha256(string).hexdigest()
  37 
  38 
  39 def qr_code_base64(token):
  40     qr = qrcode.make(
  41         token, version=1, error_correction=qrcode.constants.ERROR_CORRECT_H
  42     ).resize((250, 250))
  43     file_like = io.BytesIO()
  44     qr.save(file_like, format="png")
  45     qrcode_base64 = base64.b64encode(file_like.getvalue())
  46     return qrcode_base64
  47 
  48 
  49 class BaseTicket(CampRelatedModel, UUIDModel):
  50     ticket_type = models.ForeignKey("TicketType", on_delete=models.PROTECT)
  51     used = models.BooleanField(default=False)
  52     badge_handed_out = models.BooleanField(default=False)
  53     token = models.CharField(max_length=64, blank=True)
  54     badge_token = models.CharField(max_length=64, blank=True)
  55 
  56     class Meta:
  57         abstract = True
  58 
  59     @property
  60     def camp(self):
  61         return self.ticket_type.camp
  62 
  63     def save(self, **kwargs):
  64         self.token = self._get_token()
  65         self.badge_token = self._get_badge_token()
  66         super().save(**kwargs)
  67 
  68     def _get_token(self):
  69         return create_ticket_token(
  70             "{_id}{secret_key}".format(
  71                 _id=self.uuid, secret_key=settings.SECRET_KEY
  72             ).encode("utf-8")
  73         )
  74 
  75     def _get_badge_token(self):
  76         return create_ticket_token(
  77             "{_id}{secret_key}-badge".format(
  78                 _id=self.uuid, secret_key=settings.SECRET_KEY
  79             ).encode("utf-8")
  80         )
  81 
  82     def get_qr_code_url(self):
  83         return "data:image/png;base64,{}".format(
  84             qr_code_base64(self._get_token()).decode("utf-8")
  85         )
  86 
  87     def get_qr_badge_code_url(self):
  88         return "data:image/png;base64,{}".format(
  89             qr_code_base64(self._get_badge_token()).decode("utf-8")
  90         )
  91 
  92     def generate_pdf(self):
  93         formatdict = {"ticket": self}
  94 
  95         if self.ticket_type.single_ticket_per_product and self.shortname == "shop":
  96             orp = self.get_orp()
  97             formatdict["quantity"] = orp.quantity
  98 
  99         return generate_pdf_letter(
  100             filename="{}_ticket_{}.pdf".format(self.shortname, self.pk),
  101             formatdict=formatdict,
  102             template="pdf/ticket.html",
  103         )
  104 
  105 
  106 class SponsorTicket(BaseTicket):
  107     sponsor = models.ForeignKey("sponsors.Sponsor", on_delete=models.PROTECT)
  108 
  109     def __str__(self):
  110         return "SponsorTicket: {}".format(self.pk)
  111 
  112     @property
  113     def shortname(self):
  114         return "sponsor"
  115 
  116 
  117 class DiscountTicket(BaseTicket):
  118     price = models.IntegerField(
  119         help_text=_("Price of the discounted ticket (in DKK, including VAT).")
  120     )
  121 
  122     def __str__(self):
  123         return "DiscountTicket: {}".format(self.pk)
  124 
  125     @property
  126     def shortname(self):
  127         return "discount"
  128 
  129 
  130 class ShopTicket(BaseTicket):
  131     order = models.ForeignKey(
  132         "shop.Order", related_name="shoptickets", on_delete=models.PROTECT
  133     )
  134     product = models.ForeignKey("shop.Product", on_delete=models.PROTECT)
  135 
  136     name = models.CharField(
  137         max_length=100,
  138         help_text=(
  139             "Name of the person this ticket belongs to. "
  140             "This can be different from the buying user."
  141         ),
  142         null=True,
  143         blank=True,
  144     )
  145 
  146     email = models.EmailField(null=True, blank=True)
  147 
  148     # overwrite the _get_token method because old tickets use the user_id
  149     def _get_token(self):
  150         return hashlib.sha256(
  151             "{_id}{user_id}{secret_key}".format(
  152                 _id=self.pk, user_id=self.order.user.pk, secret_key=settings.SECRET_KEY
  153             ).encode("utf-8")
  154         ).hexdigest()
  155 
  156     def __str__(self):
  157         return "Ticket {user} {product}".format(
  158             user=self.order.user, product=self.product
  159         )
  160 
  161     def get_absolute_url(self):
  162         return str(reverse_lazy("tickets:shopticket_edit", kwargs={"pk": self.pk}))
  163 
  164     @property
  165     def shortname(self):
  166         return "shop"
  167 
  168     def get_orp(self):
  169         return OrderProductRelation.objects.get(product=self.product, order=self.order)
  170
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/src/tickets/models.py b/src/tickets/models.py
  --- a/src/tickets/models.py
  +++ b/src/tickets/models.py
  @@ -93,8 +93,7 @@
           formatdict = {"ticket": self}
   
           if self.ticket_type.single_ticket_per_product and self.shortname == "shop":
  -            orp = self.get_orp()
  -            formatdict["quantity"] = orp.quantity
  +            formatdict["quantity"] = self.orp.quantity
   
           return generate_pdf_letter(
               filename="{}_ticket_{}.pdf".format(self.shortname, self.pk),
  @@ -165,5 +164,6 @@
       def shortname(self):
           return "shop"
   
  -    def get_orp(self):
  +    @property
  +    def orp(self):
           return OrderProductRelation.objects.get(product=self.product, order=self.order)
  
verification_info: {"golden_diff": "diff --git a/src/tickets/models.py b/src/tickets/models.py\n--- a/src/tickets/models.py\n+++ b/src/tickets/models.py\n@@ -93,8 +93,7 @@\n         formatdict = {\"ticket\": self}\n \n         if self.ticket_type.single_ticket_per_product and self.shortname == \"shop\":\n-            orp = self.get_orp()\n-            formatdict[\"quantity\"] = orp.quantity\n+            formatdict[\"quantity\"] = self.orp.quantity\n \n         return generate_pdf_letter(\n             filename=\"{}_ticket_{}.pdf\".format(self.shortname, self.pk),\n@@ -165,5 +164,6 @@\n     def shortname(self):\n         return \"shop\"\n \n-    def get_orp(self):\n+    @property\n+    def orp(self):\n         return OrderProductRelation.objects.get(product=self.product, order=self.order)\n", "issue": "backoffice: show quantity of products ordered after scanning qr code\n\nbackoffice: show quantity of products ordered after scanning qr code\n\n", "before_files": [{"content": "import io\nimport hashlib\nimport base64\nimport qrcode\nfrom django.conf import settings\nfrom django.urls import reverse_lazy\nfrom django.utils.translation import ugettext_lazy as _\n\nfrom shop.models import OrderProductRelation\nfrom utils.models import UUIDModel, CampRelatedModel\nfrom utils.pdf import generate_pdf_letter\nfrom django.db import models\nimport logging\n\nlogger = logging.getLogger(\"bornhack.%s\" % __name__)\n\n\n# TicketType can be full week, one day. etc.\nclass TicketType(CampRelatedModel, UUIDModel):\n    name = models.TextField()\n    camp = models.ForeignKey(\"camps.Camp\", on_delete=models.PROTECT)\n    includes_badge = models.BooleanField(default=False)\n    single_ticket_per_product = models.BooleanField(\n        default=False,\n        help_text=(\n            \"Only create one ticket for a product/order pair no matter the quantity. \"\n            \"Useful for products which are bought in larger quantity (ie. village chairs)\"\n        ),\n    )\n\n    def __str__(self):\n        return \"{} ({})\".format(self.name, self.camp.title)\n\n\ndef create_ticket_token(string):\n    return hashlib.sha256(string).hexdigest()\n\n\ndef qr_code_base64(token):\n    qr = qrcode.make(\n        token, version=1, error_correction=qrcode.constants.ERROR_CORRECT_H\n    ).resize((250, 250))\n    file_like = io.BytesIO()\n    qr.save(file_like, format=\"png\")\n    qrcode_base64 = base64.b64encode(file_like.getvalue())\n    return qrcode_base64\n\n\nclass BaseTicket(CampRelatedModel, UUIDModel):\n    ticket_type = models.ForeignKey(\"TicketType\", on_delete=models.PROTECT)\n    used = models.BooleanField(default=False)\n    badge_handed_out = models.BooleanField(default=False)\n    token = models.CharField(max_length=64, blank=True)\n    badge_token = models.CharField(max_length=64, blank=True)\n\n    class Meta:\n        abstract = True\n\n    @property\n    def camp(self):\n        return self.ticket_type.camp\n\n    def save(self, **kwargs):\n        self.token = self._get_token()\n        self.badge_token = self._get_badge_token()\n        super().save(**kwargs)\n\n    def _get_token(self):\n        return create_ticket_token(\n            \"{_id}{secret_key}\".format(\n                _id=self.uuid, secret_key=settings.SECRET_KEY\n            ).encode(\"utf-8\")\n        )\n\n    def _get_badge_token(self):\n        return create_ticket_token(\n            \"{_id}{secret_key}-badge\".format(\n                _id=self.uuid, secret_key=settings.SECRET_KEY\n            ).encode(\"utf-8\")\n        )\n\n    def get_qr_code_url(self):\n        return \"data:image/png;base64,{}\".format(\n            qr_code_base64(self._get_token()).decode(\"utf-8\")\n        )\n\n    def get_qr_badge_code_url(self):\n        return \"data:image/png;base64,{}\".format(\n            qr_code_base64(self._get_badge_token()).decode(\"utf-8\")\n        )\n\n    def generate_pdf(self):\n        formatdict = {\"ticket\": self}\n\n        if self.ticket_type.single_ticket_per_product and self.shortname == \"shop\":\n            orp = self.get_orp()\n            formatdict[\"quantity\"] = orp.quantity\n\n        return generate_pdf_letter(\n            filename=\"{}_ticket_{}.pdf\".format(self.shortname, self.pk),\n            formatdict=formatdict,\n            template=\"pdf/ticket.html\",\n        )\n\n\nclass SponsorTicket(BaseTicket):\n    sponsor = models.ForeignKey(\"sponsors.Sponsor\", on_delete=models.PROTECT)\n\n    def __str__(self):\n        return \"SponsorTicket: {}\".format(self.pk)\n\n    @property\n    def shortname(self):\n        return \"sponsor\"\n\n\nclass DiscountTicket(BaseTicket):\n    price = models.IntegerField(\n        help_text=_(\"Price of the discounted ticket (in DKK, including VAT).\")\n    )\n\n    def __str__(self):\n        return \"DiscountTicket: {}\".format(self.pk)\n\n    @property\n    def shortname(self):\n        return \"discount\"\n\n\nclass ShopTicket(BaseTicket):\n    order = models.ForeignKey(\n        \"shop.Order\", related_name=\"shoptickets\", on_delete=models.PROTECT\n    )\n    product = models.ForeignKey(\"shop.Product\", on_delete=models.PROTECT)\n\n    name = models.CharField(\n        max_length=100,\n        help_text=(\n            \"Name of the person this ticket belongs to. \"\n            \"This can be different from the buying user.\"\n        ),\n        null=True,\n        blank=True,\n    )\n\n    email = models.EmailField(null=True, blank=True)\n\n    # overwrite the _get_token method because old tickets use the user_id\n    def _get_token(self):\n        return hashlib.sha256(\n            \"{_id}{user_id}{secret_key}\".format(\n                _id=self.pk, user_id=self.order.user.pk, secret_key=settings.SECRET_KEY\n            ).encode(\"utf-8\")\n        ).hexdigest()\n\n    def __str__(self):\n        return \"Ticket {user} {product}\".format(\n            user=self.order.user, product=self.product\n        )\n\n    def get_absolute_url(self):\n        return str(reverse_lazy(\"tickets:shopticket_edit\", kwargs={\"pk\": self.pk}))\n\n    @property\n    def shortname(self):\n        return \"shop\"\n\n    def get_orp(self):\n        return OrderProductRelation.objects.get(product=self.product, order=self.order)\n", "path": "src/tickets/models.py"}], "after_files": [{"content": "import io\nimport hashlib\nimport base64\nimport qrcode\nfrom django.conf import settings\nfrom django.urls import reverse_lazy\nfrom django.utils.translation import ugettext_lazy as _\n\nfrom shop.models import OrderProductRelation\nfrom utils.models import UUIDModel, CampRelatedModel\nfrom utils.pdf import generate_pdf_letter\nfrom django.db import models\nimport logging\n\nlogger = logging.getLogger(\"bornhack.%s\" % __name__)\n\n\n# TicketType can be full week, one day. etc.\nclass TicketType(CampRelatedModel, UUIDModel):\n    name = models.TextField()\n    camp = models.ForeignKey(\"camps.Camp\", on_delete=models.PROTECT)\n    includes_badge = models.BooleanField(default=False)\n    single_ticket_per_product = models.BooleanField(\n        default=False,\n        help_text=(\n            \"Only create one ticket for a product/order pair no matter the quantity. \"\n            \"Useful for products which are bought in larger quantity (ie. village chairs)\"\n        ),\n    )\n\n    def __str__(self):\n        return \"{} ({})\".format(self.name, self.camp.title)\n\n\ndef create_ticket_token(string):\n    return hashlib.sha256(string).hexdigest()\n\n\ndef qr_code_base64(token):\n    qr = qrcode.make(\n        token, version=1, error_correction=qrcode.constants.ERROR_CORRECT_H\n    ).resize((250, 250))\n    file_like = io.BytesIO()\n    qr.save(file_like, format=\"png\")\n    qrcode_base64 = base64.b64encode(file_like.getvalue())\n    return qrcode_base64\n\n\nclass BaseTicket(CampRelatedModel, UUIDModel):\n    ticket_type = models.ForeignKey(\"TicketType\", on_delete=models.PROTECT)\n    used = models.BooleanField(default=False)\n    badge_handed_out = models.BooleanField(default=False)\n    token = models.CharField(max_length=64, blank=True)\n    badge_token = models.CharField(max_length=64, blank=True)\n\n    class Meta:\n        abstract = True\n\n    @property\n    def camp(self):\n        return self.ticket_type.camp\n\n    def save(self, **kwargs):\n        self.token = self._get_token()\n        self.badge_token = self._get_badge_token()\n        super().save(**kwargs)\n\n    def _get_token(self):\n        return create_ticket_token(\n            \"{_id}{secret_key}\".format(\n                _id=self.uuid, secret_key=settings.SECRET_KEY\n            ).encode(\"utf-8\")\n        )\n\n    def _get_badge_token(self):\n        return create_ticket_token(\n            \"{_id}{secret_key}-badge\".format(\n                _id=self.uuid, secret_key=settings.SECRET_KEY\n            ).encode(\"utf-8\")\n        )\n\n    def get_qr_code_url(self):\n        return \"data:image/png;base64,{}\".format(\n            qr_code_base64(self._get_token()).decode(\"utf-8\")\n        )\n\n    def get_qr_badge_code_url(self):\n        return \"data:image/png;base64,{}\".format(\n            qr_code_base64(self._get_badge_token()).decode(\"utf-8\")\n        )\n\n    def generate_pdf(self):\n        formatdict = {\"ticket\": self}\n\n        if self.ticket_type.single_ticket_per_product and self.shortname == \"shop\":\n            formatdict[\"quantity\"] = self.orp.quantity\n\n        return generate_pdf_letter(\n            filename=\"{}_ticket_{}.pdf\".format(self.shortname, self.pk),\n            formatdict=formatdict,\n            template=\"pdf/ticket.html\",\n        )\n\n\nclass SponsorTicket(BaseTicket):\n    sponsor = models.ForeignKey(\"sponsors.Sponsor\", on_delete=models.PROTECT)\n\n    def __str__(self):\n        return \"SponsorTicket: {}\".format(self.pk)\n\n    @property\n    def shortname(self):\n        return \"sponsor\"\n\n\nclass DiscountTicket(BaseTicket):\n    price = models.IntegerField(\n        help_text=_(\"Price of the discounted ticket (in DKK, including VAT).\")\n    )\n\n    def __str__(self):\n        return \"DiscountTicket: {}\".format(self.pk)\n\n    @property\n    def shortname(self):\n        return \"discount\"\n\n\nclass ShopTicket(BaseTicket):\n    order = models.ForeignKey(\n        \"shop.Order\", related_name=\"shoptickets\", on_delete=models.PROTECT\n    )\n    product = models.ForeignKey(\"shop.Product\", on_delete=models.PROTECT)\n\n    name = models.CharField(\n        max_length=100,\n        help_text=(\n            \"Name of the person this ticket belongs to. \"\n            \"This can be different from the buying user.\"\n        ),\n        null=True,\n        blank=True,\n    )\n\n    email = models.EmailField(null=True, blank=True)\n\n    # overwrite the _get_token method because old tickets use the user_id\n    def _get_token(self):\n        return hashlib.sha256(\n            \"{_id}{user_id}{secret_key}\".format(\n                _id=self.pk, user_id=self.order.user.pk, secret_key=settings.SECRET_KEY\n            ).encode(\"utf-8\")\n        ).hexdigest()\n\n    def __str__(self):\n        return \"Ticket {user} {product}\".format(\n            user=self.order.user, product=self.product\n        )\n\n    def get_absolute_url(self):\n        return str(reverse_lazy(\"tickets:shopticket_edit\", kwargs={\"pk\": self.pk}))\n\n    @property\n    def shortname(self):\n        return \"shop\"\n\n    @property\n    def orp(self):\n        return OrderProductRelation.objects.get(product=self.product, order=self.order)\n", "path": "src/tickets/models.py"}]}