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我在Django很新，並試圖實現Django import-export。我的三個相關模型是官員，事件和細節。官員和事件通過細節處於M2M關係中。除了導入詳細信息外，我還獲得了所有功能。當我嘗試通過導入按鈕進行導入時，我在導入的.xls或.csv文件中獲得「NOT NULL約束失敗：police_archive_details.incident_id」。django導入導出「NOT NULL約束失敗」
這是我（目前）admin.py的
from django.contrib import admin
from import_export import resources, widgets, fields
from import_export.admin import ImportExportModelAdmin, ImportExportActionModelAdmin
from forms import AdminTextForm, OfficerTextForm
from .models import Officer, Incident, Details, SiteText
class FullNameForeignKeyWidget(widgets.ForeignKeyWidget):
def get_queryset(self, value, row):
return self.model.objects.filter(
first_name__iexact=row["first_name"],
last_name__iexact=row["last_name"]
)
class DetailsInlineAdmin (admin.TabularInline):
model = Details
extra = 5
class OfficerResource(resources.ModelResource):
class Meta:
model = Officer
class OfficerAdmin(ImportExportModelAdmin):
list_display = ('first_name', 'last_name', 'badge', 'department')
search_fields = ['first_name', 'last_name']
inlines = [DetailsInlineAdmin]
resource_class = OfficerResource
form=OfficerTextForm
class Media:
js = ('//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js','/static/admin/js/admin/popup.js')
class IncidentResource(resources.ModelResource):
officer = fields.Field(
column_name='officer',
attribute='officer',
widget=widgets.ForeignKeyWidget(Officer, 'badge'))
class Meta:
fields = ('officer',)
model = Incident
class IncidentAdmin(ImportExportModelAdmin):
list_display = ('office','case_number')
search_fields = ['case_number']
inlines = [DetailsInlineAdmin]
resource_class = IncidentResource
class DetailsResource(resources.ModelResource):
officer = fields.Field(
column_name='officer',
attribute='officer',
widget=FullNameForeignKeyWidget(Officer))
incident = fields.Field(
column_name='incident',
attribute='incident',
widget=widgets.ForeignKeyWidget(Incident, 'case_number'))
class Meta:
fields = ('id','incident','officer__last_name','officer__first_name','allegation', 'finding', 'action')
model = Details
class DetailsAdmin(ImportExportModelAdmin):
list_display=('incident','officer', 'allegation', 'finding', 'action')
search_fields = ['officer__last_name', 'incident__case_number']
resource_class = DetailsResource
class SiteTextAdmin(admin.ModelAdmin):
form=AdminTextForm
admin.site.register(Officer, OfficerAdmin)
admin.site.register(Incident, IncidentAdmin)
admin.site.register(Details, DetailsAdmin)
admin.site.register(SiteText, SiteTextAdmin)
而這裏的models.py
from __future__ import unicode_literals
from django.db import models
from tinymce import models as tinymce_models
class Officer(models.Model):
first_name = models.CharField(max_length=80, blank=True, null=True)
last_name = models.CharField(max_length=80, blank=True, null=True)
badge = models.IntegerField(blank=True, null=True)
department = models.CharField(max_length=50, blank=True, null=True)
model_pic = models.ImageField(upload_to = "police_archive/officer_photos", default= 'noimage', blank=True, null=True)
description = tinymce_models.HTMLField(blank=True, null=True)
def __str__(self):
return self.last_name + ', ' + self.first_name
class Meta():
ordering = ['last_name']
class Incident(models.Model):
officer = models.ManyToManyField(Officer, through='Details')
case_number = models.CharField(max_length=50, blank=True)
OFFICE_CHOICES = (
('CRA', 'Civilian Review Authority'),
('IA', 'Internal Affairs'),
('OPCR', 'Office of Police Conduct Review'),
)
office = models.CharField(max_length=10,
choices=OFFICE_CHOICES,
)
def __str__(self):
return self.case_number
class Meta():
ordering = ['-case_number']
class Details(models.Model):
officer = models.ForeignKey(Officer, on_delete=models.CASCADE, blank=True)
incident = models.ForeignKey(Incident, on_delete=models.CASCADE, blank=True)
allegation = models.CharField(max_length=50, blank=True)
finding = models.CharField(max_length=50, blank=True)
action = models.CharField(max_length=50, blank=True)
def __str__(self):
return self.officer.first_name + ' '+ self.officer.last_name+ ', ' + self.incident.case_number
class Meta():
verbose_name_plural = "details"
ordering = ['incident__case_number']
class SiteText(models.Model):
content1 = tinymce_models.HTMLField()
content2 = models.TextField(max_length=500, blank=True)
您可能有一個名爲police_archive_details的外鍵，但在您提供的代碼中無處可查。有更多的代碼（模型）？無論如何，顯示的錯誤告訴你，現場police_archive_details（這可能是一個FK事件）沒有事件：它是空的，但你不允許（詳見事件，添加null = True） –
我不知道我理解。警察檔案是應用程序，細節是一個模型。我的代碼正在工作。 –