prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  CSV export does not include read date
  **Describe the bug**
  When exporting data into a CSV file, several fields are exported, but `read date` is not one of them, despite being exremelly valuable.
  
  **To Reproduce**
  Steps to reproduce the behavior:
  1. Go to 'Profile'
  2. Click on 'Export to CSV'
  3. Download CSV file
  4. Open CSV file
  
  **Expected behavior**
  A column containing read date should be included among the current ones
  
  **Instance**
  bookwyrm.social
  
  
  
  ---
  
  **Desktop (please complete the following information):**
      - OS: KDE Neon
      - Browser Firefox, Chromium
      - Version 
  
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `bookwyrm/views/preferences/export.py`
  Content:
  ```
  1 """ Let users export their book data """
  2 from datetime import timedelta
  3 import csv
  4 import io
  5 
  6 from django.contrib.auth.decorators import login_required
  7 from django.core.paginator import Paginator
  8 from django.db.models import Q
  9 from django.http import HttpResponse
  10 from django.template.response import TemplateResponse
  11 from django.utils import timezone
  12 from django.views import View
  13 from django.utils.decorators import method_decorator
  14 from django.shortcuts import redirect
  15 
  16 from bookwyrm import models
  17 from bookwyrm.models.bookwyrm_export_job import BookwyrmExportJob
  18 from bookwyrm.settings import PAGE_LENGTH
  19 
  20 # pylint: disable=no-self-use
  21 @method_decorator(login_required, name="dispatch")
  22 class Export(View):
  23     """Let users export data"""
  24 
  25     def get(self, request):
  26         """Request csv file"""
  27         return TemplateResponse(request, "preferences/export.html")
  28 
  29     def post(self, request):
  30         """Download the csv file of a user's book data"""
  31         books = models.Edition.viewer_aware_objects(request.user)
  32         books_shelves = books.filter(Q(shelves__user=request.user)).distinct()
  33         books_readthrough = books.filter(Q(readthrough__user=request.user)).distinct()
  34         books_review = books.filter(Q(review__user=request.user)).distinct()
  35         books_comment = books.filter(Q(comment__user=request.user)).distinct()
  36         books_quotation = books.filter(Q(quotation__user=request.user)).distinct()
  37 
  38         books = set(
  39             list(books_shelves)
  40             + list(books_readthrough)
  41             + list(books_review)
  42             + list(books_comment)
  43             + list(books_quotation)
  44         )
  45 
  46         csv_string = io.StringIO()
  47         writer = csv.writer(csv_string)
  48 
  49         deduplication_fields = [
  50             f.name
  51             for f in models.Edition._meta.get_fields()  # pylint: disable=protected-access
  52             if getattr(f, "deduplication_field", False)
  53         ]
  54         fields = (
  55             ["title", "author_text"]
  56             + deduplication_fields
  57             + ["rating", "review_name", "review_cw", "review_content"]
  58         )
  59         writer.writerow(fields)
  60 
  61         for book in books:
  62             # I think this is more efficient than doing a subquery in the view? but idk
  63             review_rating = (
  64                 models.Review.objects.filter(
  65                     user=request.user, book=book, rating__isnull=False
  66                 )
  67                 .order_by("-published_date")
  68                 .first()
  69             )
  70 
  71             book.rating = review_rating.rating if review_rating else None
  72 
  73             review = (
  74                 models.Review.objects.filter(
  75                     user=request.user, book=book, content__isnull=False
  76                 )
  77                 .order_by("-published_date")
  78                 .first()
  79             )
  80             if review:
  81                 book.review_name = review.name
  82                 book.review_cw = review.content_warning
  83                 book.review_content = review.raw_content
  84             writer.writerow([getattr(book, field, "") or "" for field in fields])
  85 
  86         return HttpResponse(
  87             csv_string.getvalue(),
  88             content_type="text/csv",
  89             headers={
  90                 "Content-Disposition": 'attachment; filename="bookwyrm-export.csv"'
  91             },
  92         )
  93 
  94 
  95 # pylint: disable=no-self-use
  96 @method_decorator(login_required, name="dispatch")
  97 class ExportUser(View):
  98     """Let users export user data to import into another Bookwyrm instance"""
  99 
  100     def get(self, request):
  101         """Request tar file"""
  102 
  103         jobs = BookwyrmExportJob.objects.filter(user=request.user).order_by(
  104             "-created_date"
  105         )
  106         site = models.SiteSettings.objects.get()
  107         hours = site.user_import_time_limit
  108         allowed = (
  109             jobs.first().created_date < timezone.now() - timedelta(hours=hours)
  110             if jobs.first()
  111             else True
  112         )
  113         next_available = (
  114             jobs.first().created_date + timedelta(hours=hours) if not allowed else False
  115         )
  116         paginated = Paginator(jobs, PAGE_LENGTH)
  117         page = paginated.get_page(request.GET.get("page"))
  118         data = {
  119             "jobs": page,
  120             "next_available": next_available,
  121             "page_range": paginated.get_elided_page_range(
  122                 page.number, on_each_side=2, on_ends=1
  123             ),
  124         }
  125 
  126         return TemplateResponse(request, "preferences/export-user.html", data)
  127 
  128     def post(self, request):
  129         """Download the json file of a user's data"""
  130 
  131         job = BookwyrmExportJob.objects.create(user=request.user)
  132         job.start_job()
  133 
  134         return redirect("prefs-user-export")
  135 
  136 
  137 @method_decorator(login_required, name="dispatch")
  138 class ExportArchive(View):
  139     """Serve the archive file"""
  140 
  141     def get(self, request, archive_id):
  142         """download user export file"""
  143         export = BookwyrmExportJob.objects.get(task_id=archive_id, user=request.user)
  144         return HttpResponse(
  145             export.export_data,
  146             content_type="application/gzip",
  147             headers={
  148                 "Content-Disposition": 'attachment; filename="bookwyrm-account-export.tar.gz"'  # pylint: disable=line-too-long
  149             },
  150         )
  151
  ```
  --- 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/bookwyrm/views/preferences/export.py b/bookwyrm/views/preferences/export.py
  --- a/bookwyrm/views/preferences/export.py
  +++ b/bookwyrm/views/preferences/export.py
  @@ -17,7 +17,7 @@
   from bookwyrm.models.bookwyrm_export_job import BookwyrmExportJob
   from bookwyrm.settings import PAGE_LENGTH
   
  -# pylint: disable=no-self-use
  +# pylint: disable=no-self-use,too-many-locals
   @method_decorator(login_required, name="dispatch")
   class Export(View):
       """Let users export data"""
  @@ -54,6 +54,7 @@
           fields = (
               ["title", "author_text"]
               + deduplication_fields
  +            + ["start_date", "finish_date", "stopped_date"]
               + ["rating", "review_name", "review_cw", "review_content"]
           )
           writer.writerow(fields)
  @@ -70,6 +71,24 @@
   
               book.rating = review_rating.rating if review_rating else None
   
  +            readthrough = (
  +                models.ReadThrough.objects.filter(user=request.user, book=book)
  +                .order_by("-start_date", "-finish_date")
  +                .first()
  +            )
  +            if readthrough:
  +                book.start_date = (
  +                    readthrough.start_date.date() if readthrough.start_date else None
  +                )
  +                book.finish_date = (
  +                    readthrough.finish_date.date() if readthrough.finish_date else None
  +                )
  +                book.stopped_date = (
  +                    readthrough.stopped_date.date()
  +                    if readthrough.stopped_date
  +                    else None
  +                )
  +
               review = (
                   models.Review.objects.filter(
                       user=request.user, book=book, content__isnull=False
  
verification_info: {"golden_diff": "diff --git a/bookwyrm/views/preferences/export.py b/bookwyrm/views/preferences/export.py\n--- a/bookwyrm/views/preferences/export.py\n+++ b/bookwyrm/views/preferences/export.py\n@@ -17,7 +17,7 @@\n from bookwyrm.models.bookwyrm_export_job import BookwyrmExportJob\n from bookwyrm.settings import PAGE_LENGTH\n \n-# pylint: disable=no-self-use\n+# pylint: disable=no-self-use,too-many-locals\n @method_decorator(login_required, name=\"dispatch\")\n class Export(View):\n     \"\"\"Let users export data\"\"\"\n@@ -54,6 +54,7 @@\n         fields = (\n             [\"title\", \"author_text\"]\n             + deduplication_fields\n+            + [\"start_date\", \"finish_date\", \"stopped_date\"]\n             + [\"rating\", \"review_name\", \"review_cw\", \"review_content\"]\n         )\n         writer.writerow(fields)\n@@ -70,6 +71,24 @@\n \n             book.rating = review_rating.rating if review_rating else None\n \n+            readthrough = (\n+                models.ReadThrough.objects.filter(user=request.user, book=book)\n+                .order_by(\"-start_date\", \"-finish_date\")\n+                .first()\n+            )\n+            if readthrough:\n+                book.start_date = (\n+                    readthrough.start_date.date() if readthrough.start_date else None\n+                )\n+                book.finish_date = (\n+                    readthrough.finish_date.date() if readthrough.finish_date else None\n+                )\n+                book.stopped_date = (\n+                    readthrough.stopped_date.date()\n+                    if readthrough.stopped_date\n+                    else None\n+                )\n+\n             review = (\n                 models.Review.objects.filter(\n                     user=request.user, book=book, content__isnull=False\n", "issue": "CSV export does not include read date\n**Describe the bug**\r\nWhen exporting data into a CSV file, several fields are exported, but `read date` is not one of them, despite being exremelly valuable.\r\n\r\n**To Reproduce**\r\nSteps to reproduce the behavior:\r\n1. Go to 'Profile'\r\n2. Click on 'Export to CSV'\r\n3. Download CSV file\r\n4. Open CSV file\r\n\r\n**Expected behavior**\r\nA column containing read date should be included among the current ones\r\n\r\n**Instance**\r\nbookwyrm.social\r\n\r\n\r\n\r\n---\r\n\r\n**Desktop (please complete the following information):**\r\n    - OS: KDE Neon\r\n    - Browser Firefox, Chromium\r\n    - Version \r\n\n", "before_files": [{"content": "\"\"\" Let users export their book data \"\"\"\nfrom datetime import timedelta\nimport csv\nimport io\n\nfrom django.contrib.auth.decorators import login_required\nfrom django.core.paginator import Paginator\nfrom django.db.models import Q\nfrom django.http import HttpResponse\nfrom django.template.response import TemplateResponse\nfrom django.utils import timezone\nfrom django.views import View\nfrom django.utils.decorators import method_decorator\nfrom django.shortcuts import redirect\n\nfrom bookwyrm import models\nfrom bookwyrm.models.bookwyrm_export_job import BookwyrmExportJob\nfrom bookwyrm.settings import PAGE_LENGTH\n\n# pylint: disable=no-self-use\n@method_decorator(login_required, name=\"dispatch\")\nclass Export(View):\n    \"\"\"Let users export data\"\"\"\n\n    def get(self, request):\n        \"\"\"Request csv file\"\"\"\n        return TemplateResponse(request, \"preferences/export.html\")\n\n    def post(self, request):\n        \"\"\"Download the csv file of a user's book data\"\"\"\n        books = models.Edition.viewer_aware_objects(request.user)\n        books_shelves = books.filter(Q(shelves__user=request.user)).distinct()\n        books_readthrough = books.filter(Q(readthrough__user=request.user)).distinct()\n        books_review = books.filter(Q(review__user=request.user)).distinct()\n        books_comment = books.filter(Q(comment__user=request.user)).distinct()\n        books_quotation = books.filter(Q(quotation__user=request.user)).distinct()\n\n        books = set(\n            list(books_shelves)\n            + list(books_readthrough)\n            + list(books_review)\n            + list(books_comment)\n            + list(books_quotation)\n        )\n\n        csv_string = io.StringIO()\n        writer = csv.writer(csv_string)\n\n        deduplication_fields = [\n            f.name\n            for f in models.Edition._meta.get_fields()  # pylint: disable=protected-access\n            if getattr(f, \"deduplication_field\", False)\n        ]\n        fields = (\n            [\"title\", \"author_text\"]\n            + deduplication_fields\n            + [\"rating\", \"review_name\", \"review_cw\", \"review_content\"]\n        )\n        writer.writerow(fields)\n\n        for book in books:\n            # I think this is more efficient than doing a subquery in the view? but idk\n            review_rating = (\n                models.Review.objects.filter(\n                    user=request.user, book=book, rating__isnull=False\n                )\n                .order_by(\"-published_date\")\n                .first()\n            )\n\n            book.rating = review_rating.rating if review_rating else None\n\n            review = (\n                models.Review.objects.filter(\n                    user=request.user, book=book, content__isnull=False\n                )\n                .order_by(\"-published_date\")\n                .first()\n            )\n            if review:\n                book.review_name = review.name\n                book.review_cw = review.content_warning\n                book.review_content = review.raw_content\n            writer.writerow([getattr(book, field, \"\") or \"\" for field in fields])\n\n        return HttpResponse(\n            csv_string.getvalue(),\n            content_type=\"text/csv\",\n            headers={\n                \"Content-Disposition\": 'attachment; filename=\"bookwyrm-export.csv\"'\n            },\n        )\n\n\n# pylint: disable=no-self-use\n@method_decorator(login_required, name=\"dispatch\")\nclass ExportUser(View):\n    \"\"\"Let users export user data to import into another Bookwyrm instance\"\"\"\n\n    def get(self, request):\n        \"\"\"Request tar file\"\"\"\n\n        jobs = BookwyrmExportJob.objects.filter(user=request.user).order_by(\n            \"-created_date\"\n        )\n        site = models.SiteSettings.objects.get()\n        hours = site.user_import_time_limit\n        allowed = (\n            jobs.first().created_date < timezone.now() - timedelta(hours=hours)\n            if jobs.first()\n            else True\n        )\n        next_available = (\n            jobs.first().created_date + timedelta(hours=hours) if not allowed else False\n        )\n        paginated = Paginator(jobs, PAGE_LENGTH)\n        page = paginated.get_page(request.GET.get(\"page\"))\n        data = {\n            \"jobs\": page,\n            \"next_available\": next_available,\n            \"page_range\": paginated.get_elided_page_range(\n                page.number, on_each_side=2, on_ends=1\n            ),\n        }\n\n        return TemplateResponse(request, \"preferences/export-user.html\", data)\n\n    def post(self, request):\n        \"\"\"Download the json file of a user's data\"\"\"\n\n        job = BookwyrmExportJob.objects.create(user=request.user)\n        job.start_job()\n\n        return redirect(\"prefs-user-export\")\n\n\n@method_decorator(login_required, name=\"dispatch\")\nclass ExportArchive(View):\n    \"\"\"Serve the archive file\"\"\"\n\n    def get(self, request, archive_id):\n        \"\"\"download user export file\"\"\"\n        export = BookwyrmExportJob.objects.get(task_id=archive_id, user=request.user)\n        return HttpResponse(\n            export.export_data,\n            content_type=\"application/gzip\",\n            headers={\n                \"Content-Disposition\": 'attachment; filename=\"bookwyrm-account-export.tar.gz\"'  # pylint: disable=line-too-long\n            },\n        )\n", "path": "bookwyrm/views/preferences/export.py"}], "after_files": [{"content": "\"\"\" Let users export their book data \"\"\"\nfrom datetime import timedelta\nimport csv\nimport io\n\nfrom django.contrib.auth.decorators import login_required\nfrom django.core.paginator import Paginator\nfrom django.db.models import Q\nfrom django.http import HttpResponse\nfrom django.template.response import TemplateResponse\nfrom django.utils import timezone\nfrom django.views import View\nfrom django.utils.decorators import method_decorator\nfrom django.shortcuts import redirect\n\nfrom bookwyrm import models\nfrom bookwyrm.models.bookwyrm_export_job import BookwyrmExportJob\nfrom bookwyrm.settings import PAGE_LENGTH\n\n# pylint: disable=no-self-use,too-many-locals\n@method_decorator(login_required, name=\"dispatch\")\nclass Export(View):\n    \"\"\"Let users export data\"\"\"\n\n    def get(self, request):\n        \"\"\"Request csv file\"\"\"\n        return TemplateResponse(request, \"preferences/export.html\")\n\n    def post(self, request):\n        \"\"\"Download the csv file of a user's book data\"\"\"\n        books = models.Edition.viewer_aware_objects(request.user)\n        books_shelves = books.filter(Q(shelves__user=request.user)).distinct()\n        books_readthrough = books.filter(Q(readthrough__user=request.user)).distinct()\n        books_review = books.filter(Q(review__user=request.user)).distinct()\n        books_comment = books.filter(Q(comment__user=request.user)).distinct()\n        books_quotation = books.filter(Q(quotation__user=request.user)).distinct()\n\n        books = set(\n            list(books_shelves)\n            + list(books_readthrough)\n            + list(books_review)\n            + list(books_comment)\n            + list(books_quotation)\n        )\n\n        csv_string = io.StringIO()\n        writer = csv.writer(csv_string)\n\n        deduplication_fields = [\n            f.name\n            for f in models.Edition._meta.get_fields()  # pylint: disable=protected-access\n            if getattr(f, \"deduplication_field\", False)\n        ]\n        fields = (\n            [\"title\", \"author_text\"]\n            + deduplication_fields\n            + [\"start_date\", \"finish_date\", \"stopped_date\"]\n            + [\"rating\", \"review_name\", \"review_cw\", \"review_content\"]\n        )\n        writer.writerow(fields)\n\n        for book in books:\n            # I think this is more efficient than doing a subquery in the view? but idk\n            review_rating = (\n                models.Review.objects.filter(\n                    user=request.user, book=book, rating__isnull=False\n                )\n                .order_by(\"-published_date\")\n                .first()\n            )\n\n            book.rating = review_rating.rating if review_rating else None\n\n            readthrough = (\n                models.ReadThrough.objects.filter(user=request.user, book=book)\n                .order_by(\"-start_date\", \"-finish_date\")\n                .first()\n            )\n            if readthrough:\n                book.start_date = (\n                    readthrough.start_date.date() if readthrough.start_date else None\n                )\n                book.finish_date = (\n                    readthrough.finish_date.date() if readthrough.finish_date else None\n                )\n                book.stopped_date = (\n                    readthrough.stopped_date.date()\n                    if readthrough.stopped_date\n                    else None\n                )\n\n            review = (\n                models.Review.objects.filter(\n                    user=request.user, book=book, content__isnull=False\n                )\n                .order_by(\"-published_date\")\n                .first()\n            )\n            if review:\n                book.review_name = review.name\n                book.review_cw = review.content_warning\n                book.review_content = review.raw_content\n            writer.writerow([getattr(book, field, \"\") or \"\" for field in fields])\n\n        return HttpResponse(\n            csv_string.getvalue(),\n            content_type=\"text/csv\",\n            headers={\n                \"Content-Disposition\": 'attachment; filename=\"bookwyrm-export.csv\"'\n            },\n        )\n\n\n# pylint: disable=no-self-use\n@method_decorator(login_required, name=\"dispatch\")\nclass ExportUser(View):\n    \"\"\"Let users export user data to import into another Bookwyrm instance\"\"\"\n\n    def get(self, request):\n        \"\"\"Request tar file\"\"\"\n\n        jobs = BookwyrmExportJob.objects.filter(user=request.user).order_by(\n            \"-created_date\"\n        )\n        site = models.SiteSettings.objects.get()\n        hours = site.user_import_time_limit\n        allowed = (\n            jobs.first().created_date < timezone.now() - timedelta(hours=hours)\n            if jobs.first()\n            else True\n        )\n        next_available = (\n            jobs.first().created_date + timedelta(hours=hours) if not allowed else False\n        )\n        paginated = Paginator(jobs, PAGE_LENGTH)\n        page = paginated.get_page(request.GET.get(\"page\"))\n        data = {\n            \"jobs\": page,\n            \"next_available\": next_available,\n            \"page_range\": paginated.get_elided_page_range(\n                page.number, on_each_side=2, on_ends=1\n            ),\n        }\n\n        return TemplateResponse(request, \"preferences/export-user.html\", data)\n\n    def post(self, request):\n        \"\"\"Download the json file of a user's data\"\"\"\n\n        job = BookwyrmExportJob.objects.create(user=request.user)\n        job.start_job()\n\n        return redirect(\"prefs-user-export\")\n\n\n@method_decorator(login_required, name=\"dispatch\")\nclass ExportArchive(View):\n    \"\"\"Serve the archive file\"\"\"\n\n    def get(self, request, archive_id):\n        \"\"\"download user export file\"\"\"\n        export = BookwyrmExportJob.objects.get(task_id=archive_id, user=request.user)\n        return HttpResponse(\n            export.export_data,\n            content_type=\"application/gzip\",\n            headers={\n                \"Content-Disposition\": 'attachment; filename=\"bookwyrm-account-export.tar.gz\"'  # pylint: disable=line-too-long\n            },\n        )\n", "path": "bookwyrm/views/preferences/export.py"}]}