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Merge v2.11.10
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@ -18,7 +18,7 @@ from utilities.utils import content_type_name
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from utilities.validators import EnhancedURLValidator
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from . import widgets
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from .constants import *
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from .utils import expand_alphanumeric_pattern, expand_ipaddress_pattern
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from .utils import expand_alphanumeric_pattern, expand_ipaddress_pattern, parse_csv, validate_csv
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__all__ = (
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'ColorField',
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@ -28,6 +28,7 @@ __all__ = (
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'CSVChoiceField',
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'CSVContentTypeField',
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'CSVDataField',
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'CSVFileField',
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'CSVModelChoiceField',
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'CSVMultipleContentTypeField',
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'CSVTypedChoiceField',
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@ -184,49 +185,54 @@ class CSVDataField(forms.CharField):
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'in double quotes.'
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def to_python(self, value):
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records = []
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reader = csv.reader(StringIO(value.strip()))
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# Consume the first line of CSV data as column headers. Create a dictionary mapping each header to an optional
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# "to" field specifying how the related object is being referenced. For example, importing a Device might use a
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# `site.slug` header, to indicate the related site is being referenced by its slug.
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headers = {}
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for header in next(reader):
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if '.' in header:
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field, to_field = header.split('.', 1)
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headers[field] = to_field
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else:
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headers[header] = None
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return parse_csv(reader)
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# Parse CSV rows into a list of dictionaries mapped from the column headers.
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for i, row in enumerate(reader, start=1):
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if len(row) != len(headers):
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raise forms.ValidationError(
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f"Row {i}: Expected {len(headers)} columns but found {len(row)}"
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)
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row = [col.strip() for col in row]
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record = dict(zip(headers.keys(), row))
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records.append(record)
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def validate(self, value):
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headers, records = value
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validate_csv(headers, self.fields, self.required_fields)
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return value
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class CSVFileField(forms.FileField):
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"""
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A FileField (rendered as a file input button) which accepts a file containing CSV-formatted data. It returns
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data as a two-tuple: The first item is a dictionary of column headers, mapping field names to the attribute
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by which they match a related object (where applicable). The second item is a list of dictionaries, each
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representing a discrete row of CSV data.
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:param from_form: The form from which the field derives its validation rules.
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"""
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def __init__(self, from_form, *args, **kwargs):
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form = from_form()
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self.model = form.Meta.model
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self.fields = form.fields
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self.required_fields = [
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name for name, field in form.fields.items() if field.required
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]
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super().__init__(*args, **kwargs)
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def to_python(self, file):
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if file is None:
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return None
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csv_str = file.read().decode('utf-8').strip()
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reader = csv.reader(csv_str.splitlines())
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headers, records = parse_csv(reader)
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return headers, records
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def validate(self, value):
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if value is None:
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return None
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headers, records = value
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# Validate provided column headers
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for field, to_field in headers.items():
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if field not in self.fields:
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raise forms.ValidationError(f'Unexpected column header "{field}" found.')
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if to_field and not hasattr(self.fields[field], 'to_field_name'):
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raise forms.ValidationError(f'Column "{field}" is not a related object; cannot use dots')
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if to_field and not hasattr(self.fields[field].queryset.model, to_field):
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raise forms.ValidationError(f'Invalid related object attribute for column "{field}": {to_field}')
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# Validate required fields
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for f in self.required_fields:
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if f not in headers:
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raise forms.ValidationError(f'Required column header "{f}" not found.')
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validate_csv(headers, self.fields, self.required_fields)
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return value
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