Adjusted serialization to support for_export.

Author: hcpchris

CHANGES.rst

@@ -1,5 +1,5 @@
 
-Release 1.7.7
+Release 1.8.0
 =========================================
 
 * **BUGFIX:** Fixed over-eager trimming of ``None`` data values when serializing ``.to_json()`` for
@@ -8,6 +8,10 @@ Release 1.7.7
   ``RangeData``-descended). Closes #176.
 * **BUGFIX:** Fixed coercion of `datetime.date` type values to milliseconds when serializaing ``.to_json()``
   for export via the Export Server.
+* **ENHANCEMENT:** Added ``for_export`` as a special parameter to the ``.to_json()`` serialization method
+  to maintain past behavior while simultaneously fixing serialization bugs related to export via the Node
+  Export Server. Extended ``.trim_dict()`` and ``.trim_iterable()`` internal methods with ``for_export`` 
+  support for the same purpose.
 
 --------------------
 

highcharts_core/__version__.py

@@ -1 +1 @@
-__version__ = '1.7.7'
+__version__ = '1.8.0'

highcharts_core/headless_export.py

@@ -764,7 +764,7 @@ def request_chart(self,
                                                           'using a series type introduced in v.11. Sorry, but '
                                                           'that functionality is still forthcoming.')
 
-        options_as_json = self.options.to_json()
+        options_as_json = self.options.to_json(for_export = True)
         if isinstance(options_as_json, bytes):
             options_as_str = str(options_as_json, encoding = 'utf-8')
         else:
@@ -773,31 +773,31 @@ def request_chart(self,
         as_json = as_json.replace('"HIGHCHARTS FOR PYTHON: REPLACE WITH OPTIONS"',
                                   options_as_str)
         if self.callback:
-            callback_as_json = self.callback.to_json()
+            callback_as_json = self.callback.to_json(for_export = True)
             if isinstance(callback_as_json, bytes):
                 callback_as_str = str(callback_as_json, encoding = 'utf-8')
             else:
                 callback_as_str = callback_as_json
             as_json = as_json.replace('"HIGHCHARTS FOR PYTHON: REPLACE WITH CALLBACK"',
                                       callback_as_str)
         if self.global_options:
-            global_as_json = self.global_options.to_json()
+            global_as_json = self.global_options.to_json(for_export = True)
             if isinstance(global_as_json, bytes):
                 global_as_str = str(global_as_json, encoding = 'utf-8')
             else:
                 global_as_str = global_as_json
             as_json = as_json.replace('"HIGHCHARTS FOR PYTHON: REPLACE WITH GLOBAL"',
                                       global_as_str)
         if self.data_options:
-            data_as_json = self.data_options.to_json()
+            data_as_json = self.data_options.to_json(for_export = True)
             if isinstance(data_as_json, bytes):
                 data_as_str = str(data_as_json, encoding = 'utf-8')
             else:
                 data_as_str = data_as_json
             as_json = as_json.replace('"HIGHCHARTS FOR PYTHON: REPLACE WITH DATA"',
                                       data_as_str)
         if self.custom_code:
-            code_as_json = self.custom_code.to_json()
+            code_as_json = self.custom_code.to_json(for_export = True)
             if isinstance(code_as_json, bytes):
                 code_as_str = str(code_as_json, encoding = 'utf-8')
             else: