Merge pull request #445 from WasinTh/drf-extra-fields-base64-integration

Drf extra fields base64 integration

Author: JoelLefkowitz

README.rst

@@ -358,3 +358,28 @@ provided out of the box - if you have ``djangorestframework-recursive`` installe
 
 .. |nbsp| unicode:: 0xA0
    :trim:
+
+drf-extra-fields
+===============================
+Integration with `drf-extra-fields <https://github.com/Hipo/drf-extra-fields>`_ has a problem with Base64 fields. The drf-yasg will generate Base64 file or image fields as Readonly and not required. Here is a workaround code for display the Base64 fields correctly.
+
+.. code:: python
+
+class PDFBase64FileField(Base64FileField):
+    ALLOWED_TYPES = ['pdf']
+
+    class Meta:
+        swagger_schema_fields = {
+            'type': 'string',
+            'title': 'File Content',
+            'description': 'Content of the file base64 encoded',
+            'read_only': False  # <-- FIX
+        }
+
+    def get_file_extension(self, filename, decoded_file):
+        try:
+            PyPDF2.PdfFileReader(io.BytesIO(decoded_file))
+        except PyPDF2.utils.PdfReadError as e:
+            logger.warning(e)
+        else:
+            return 'pdf'