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85 lines
2.8 KiB
85 lines
2.8 KiB
# ~*~ coding: utf-8 ~*~
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#
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import unicodecsv
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import codecs
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from datetime import datetime
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from six import BytesIO
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from rest_framework.renderers import BaseRenderer
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from rest_framework.utils import encoders, json
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from ..utils import get_logger
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logger = get_logger(__file__)
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class JMSCSVRender(BaseRenderer):
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media_type = 'text/csv'
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format = 'csv'
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@staticmethod
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def _get_header(fields, template):
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if template == 'import':
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header = [
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k for k, v in fields.items()
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if not v.read_only and k != 'org_id'
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]
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elif template == 'update':
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header = [k for k, v in fields.items() if not v.read_only]
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else:
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# template in ['export']
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header = [k for k, v in fields.items() if not v.write_only]
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return header
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@staticmethod
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def _gen_table(data, header, labels=None):
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labels = labels or {}
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yield [labels.get(k, k) for k in header]
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for item in data:
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row = [item.get(key) for key in header]
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yield row
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def set_response_disposition(self, serializer, context):
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response = context.get('response')
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if response and hasattr(serializer, 'Meta') and \
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hasattr(serializer.Meta, "model"):
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model_name = serializer.Meta.model.__name__.lower()
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now = datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
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filename = "{}_{}.csv".format(model_name, now)
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disposition = 'attachment; filename="{}"'.format(filename)
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response['Content-Disposition'] = disposition
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def render(self, data, media_type=None, renderer_context=None):
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renderer_context = renderer_context or {}
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request = renderer_context['request']
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template = request.query_params.get('template', 'export')
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view = renderer_context['view']
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data = json.loads(json.dumps(data, cls=encoders.JSONEncoder))
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if template == 'import':
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data = [data[0]] if data else data
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try:
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serializer = view.get_serializer()
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self.set_response_disposition(serializer, renderer_context)
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except Exception as e:
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logger.debug(e, exc_info=True)
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value = 'The resource not support export!'.encode('utf-8')
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else:
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fields = serializer.get_fields()
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header = self._get_header(fields, template)
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labels = {k: v.label for k, v in fields.items() if v.label}
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table = self._gen_table(data, header, labels)
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csv_buffer = BytesIO()
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csv_buffer.write(codecs.BOM_UTF8)
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csv_writer = unicodecsv.writer(csv_buffer, encoding='utf-8')
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for row in table:
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csv_writer.writerow(row)
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value = csv_buffer.getvalue()
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return value
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