prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Require minium length for "explanation" field in BCD signals
  **Summary**
  _What should be changed?_
  A minimum length of 10 characters should be required for the "explanation" field in BCD signals
  
  **Rationale**
  _What problems would this solve?_
  Less spam submissions
  
  **Audience**
  _Who would use this changed feature?_
  BCD maintainers
  
  **Proposal**
  _What would users see and do? What would happen as a result?_
  Users would be required to enter a meaningful explanation and hopefully refrain from submitting "fehfs", "test", and other garbage.
  
  **Additional context**
  _Is there anything else we should know?_
  Was discussed in https://github.com/mdn/sprints/issues/2289
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `kuma/api/v1/serializers.py`
  Content:
  ```
  1 from rest_framework import exceptions
  2 from rest_framework import serializers
  3 
  4 from kuma.wiki.models import BCSignal, Document
  5 
  6 
  7 class BCSignalSerializer(serializers.Serializer):
  8     feature = serializers.CharField(max_length=255)
  9     browsers = serializers.CharField(max_length=255)
  10     slug = serializers.CharField(max_length=255)
  11     locale = serializers.CharField(max_length=7)
  12     explanation = serializers.CharField(allow_blank=True, max_length=1000)
  13     supporting_material = serializers.CharField(
  14         allow_blank=True, required=False, max_length=1000
  15     )
  16 
  17     def create(self, validated_data):
  18         slug = validated_data.pop("slug")
  19         locale = validated_data.pop("locale")
  20         document = Document.objects.filter(slug=slug, locale=locale).first()
  21 
  22         if document:
  23             return BCSignal.objects.create(document=document, **validated_data)
  24         raise exceptions.ValidationError("Document not found")
  25
  ```
  --- 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/kuma/api/v1/serializers.py b/kuma/api/v1/serializers.py
  --- a/kuma/api/v1/serializers.py
  +++ b/kuma/api/v1/serializers.py
  @@ -9,7 +9,11 @@
       browsers = serializers.CharField(max_length=255)
       slug = serializers.CharField(max_length=255)
       locale = serializers.CharField(max_length=7)
  -    explanation = serializers.CharField(allow_blank=True, max_length=1000)
  +    explanation = serializers.CharField(
  +        # Make sure these match the constants in bcd-signal.jsx
  +        max_length=1000,
  +        min_length=10,
  +    )
       supporting_material = serializers.CharField(
           allow_blank=True, required=False, max_length=1000
       )
  
verification_info: {"golden_diff": "diff --git a/kuma/api/v1/serializers.py b/kuma/api/v1/serializers.py\n--- a/kuma/api/v1/serializers.py\n+++ b/kuma/api/v1/serializers.py\n@@ -9,7 +9,11 @@\n     browsers = serializers.CharField(max_length=255)\n     slug = serializers.CharField(max_length=255)\n     locale = serializers.CharField(max_length=7)\n-    explanation = serializers.CharField(allow_blank=True, max_length=1000)\n+    explanation = serializers.CharField(\n+        # Make sure these match the constants in bcd-signal.jsx\n+        max_length=1000,\n+        min_length=10,\n+    )\n     supporting_material = serializers.CharField(\n         allow_blank=True, required=False, max_length=1000\n     )\n", "issue": "Require minium length for \"explanation\" field in BCD signals\n**Summary**\r\n_What should be changed?_\r\nA minimum length of 10 characters should be required for the \"explanation\" field in BCD signals\r\n\r\n**Rationale**\r\n_What problems would this solve?_\r\nLess spam submissions\r\n\r\n**Audience**\r\n_Who would use this changed feature?_\r\nBCD maintainers\r\n\r\n**Proposal**\r\n_What would users see and do? What would happen as a result?_\r\nUsers would be required to enter a meaningful explanation and hopefully refrain from submitting \"fehfs\", \"test\", and other garbage.\r\n\r\n**Additional context**\r\n_Is there anything else we should know?_\r\nWas discussed in https://github.com/mdn/sprints/issues/2289\n", "before_files": [{"content": "from rest_framework import exceptions\nfrom rest_framework import serializers\n\nfrom kuma.wiki.models import BCSignal, Document\n\n\nclass BCSignalSerializer(serializers.Serializer):\n    feature = serializers.CharField(max_length=255)\n    browsers = serializers.CharField(max_length=255)\n    slug = serializers.CharField(max_length=255)\n    locale = serializers.CharField(max_length=7)\n    explanation = serializers.CharField(allow_blank=True, max_length=1000)\n    supporting_material = serializers.CharField(\n        allow_blank=True, required=False, max_length=1000\n    )\n\n    def create(self, validated_data):\n        slug = validated_data.pop(\"slug\")\n        locale = validated_data.pop(\"locale\")\n        document = Document.objects.filter(slug=slug, locale=locale).first()\n\n        if document:\n            return BCSignal.objects.create(document=document, **validated_data)\n        raise exceptions.ValidationError(\"Document not found\")\n", "path": "kuma/api/v1/serializers.py"}], "after_files": [{"content": "from rest_framework import exceptions\nfrom rest_framework import serializers\n\nfrom kuma.wiki.models import BCSignal, Document\n\n\nclass BCSignalSerializer(serializers.Serializer):\n    feature = serializers.CharField(max_length=255)\n    browsers = serializers.CharField(max_length=255)\n    slug = serializers.CharField(max_length=255)\n    locale = serializers.CharField(max_length=7)\n    explanation = serializers.CharField(\n        # Make sure these match the constants in bcd-signal.jsx\n        max_length=1000,\n        min_length=10,\n    )\n    supporting_material = serializers.CharField(\n        allow_blank=True, required=False, max_length=1000\n    )\n\n    def create(self, validated_data):\n        slug = validated_data.pop(\"slug\")\n        locale = validated_data.pop(\"locale\")\n        document = Document.objects.filter(slug=slug, locale=locale).first()\n\n        if document:\n            return BCSignal.objects.create(document=document, **validated_data)\n        raise exceptions.ValidationError(\"Document not found\")\n", "path": "kuma/api/v1/serializers.py"}]}