- Author:
- selimnairb
- Posted:
- February 1, 2014
- Language:
- Python
- Version:
- 1.6
- Score:
- 0 (after 0 ratings)
Based on #2868
Now with support for writing the absolute URL of file fields
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | from django.http import HttpResponse
from django.db.models.query import QuerySet
from django.db.models.fields.files import FieldFile
import csv
def prep_field(request, obj, field, manyToManySep=';'):
""" Returns the field as a unicode string. If the field is a callable, it
attempts to call it first, without arguments.
"""
if '__' in field:
bits = field.split('__')
field = bits.pop()
for bit in bits:
obj = getattr(obj, bit, None)
if obj is None:
return ""
attr = getattr(obj, field)
if isinstance(attr, (FieldFile,) ):
attr = request.build_absolute_uri(attr.url)
output = attr() if callable(attr) else attr
if isinstance(output, (list, tuple, QuerySet)):
output = manyToManySep.join([str(item) for item in output])
return unicode(output).encode('utf-8') if output else ""
def export_csv_action(description="Export as CSV", fields=None, exclude=None, header=True,
manyToManySep=';'):
""" This function returns an export csv action. """
def export_as_csv(modeladmin, request, queryset):
""" Generic csv export admin action.
Based on http://djangosnippets.org/snippets/2712/
"""
opts = modeladmin.model._meta
field_names = [field.name for field in opts.fields]
labels = []
if exclude:
field_names = [f for f in field_names if f not in exclude]
elif fields:
field_names = [field for field, _ in fields]
labels = [label for _, label in fields]
response = HttpResponse(mimetype='text/csv')
response['Content-Disposition'] = 'attachment; filename=%s.csv' % (
unicode(opts).replace('.', '_')
)
writer = csv.writer(response)
if header:
writer.writerow(labels if labels else field_names)
for obj in queryset:
writer.writerow([prep_field(request, obj, field, manyToManySep) for field in field_names])
return response
export_as_csv.short_description = description
export_as_csv.acts_on_all = True
return export_as_csv
# Example usage
from django.contrib import admin
class ExampleModelAdmin(admin.ModelAdmin):
raw_id_fields = ('field1',)
list_display = ('field1', 'field2', 'field3',)
actions = [
export_csv_action("Export Sepecial Report",
fields=[
('field1', 'label1'),
('foreignkey1__name', 'label2'),
('manytomany__all', 'label3'),
],
header=True,
manyToManySep=';'
),
]
admin.site.register(ExampleMode, ExampleModelAdmin)
|
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