「IndentationError: unindent does not match any outer indentation level」エラーについて

Question

以下のコードにつきまして、エラーが発生してしまった為、ご助言頂けましたら幸いです...
コードは一部抜粋となります。

from django import forms
from django.contrib import admin
from django.contrib.auth.models import Group
from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
from django.contrib.auth.forms import ReadOnlyPasswordHashField

from .models import User,Company,Product,Alert,Contract,log_table

class UserCreationForm(forms.ModelForm):
    """A form for creating new users. Includes all the required
    fields, plus a repeated password."""
    password1 = forms.CharField(label='Password', widget=forms.PasswordInput)
    password2 = forms.CharField(label='Password confirmation', widget=forms.PasswordInput)

    class Meta:
        model = User
        fields = ('email', 'username','password')

    def clean_password2(self):
        # Check that the two password entries match
        password1 = self.cleaned_data.get("password1")
        password2 = self.cleaned_data.get("password2")
        if password1 and password2 and password1 != password2:
            raise forms.ValidationError("Passwords don't match")
        return password2

    def save(self, commit=True):
        # Save the provided password in hashed format
        user = super().save(commit=False)
        user.set_password(self.cleaned_data["password1"])
        if commit:
            user.save()
        return user


class UserChangeForm(forms.ModelForm):
    """A form for updating users. Includes all the fields on
    the user, but replaces the password field with admin's
    password hash display field.
    """
    password = ReadOnlyPasswordHashField()

    class Meta:
        model = User
        fields = ('email', 'password', 'username','is_admin')

    def clean_password(self):
        # Regardless of what the user provides, return the initial value.
        # This is done here, rather than on the field, because the
        # field does not have access to the initial value
        return self.initial["password"]


class UserAdmin(BaseUserAdmin):
    # The forms to add and change user instances
    form = UserChangeForm
    add_form = UserCreationForm

    # The fields to be used in displaying the User model.
    # These override the definitions on the base UserAdmin
    # that reference specific fields on auth.User.
    list_display = ('username','email','is_admin','is_active','created_at','updated_at')
    list_filter = ('is_admin',)
    fieldsets = (
        (None, {'fields': ('email', 'password')}),
        ('Personal info', {'fields': ('username',)}),
        ('Permissions', {'fields': ('is_admin',)}),
    )
    # add_fieldsets is not a standard ModelAdmin attribute. UserAdmin
    # overrides get_fieldsets to use this attribute when creating a user.
    add_fieldsets = (
        (None, {
            'classes': ('wide',),
            'fields': ('email', 'username', 'password1', 'password2'),
        }),
    )
    search_fields = ('email',)
    ordering = ('email',)
    filter_horizontal = ()



# ... and, since we're not using Django's built-in permissions,
# unregister the Group model from admin.
# admin.site.unregister(Group)

class UserInline(admin.TabularInline):
    model = User
    can_delete = False
    extra = 3
class CompanyInline(admin.TabularInline):
    model = Company
    extra = 3

class ContractInline(admin.TabularInline):
    model = Contract
    can_delete = False
class CompanyAdmin(admin.ModelAdmin):
    fieldsets = [
        ('Company',{'fields': ['name'],}),
        (None, {'fields': ['email'],}),
        (None,{'fields': ['phone_numer'],}),
        (None,{'fields': ['company_address'],}),
    ]
    list_display = ('name','email','phone_numer','created_at','updated_at')
    inlines = [UserInline,ContractInline]
    

class ProductAdmin(admin.ModelAdmin):
    fieldsets = [
        ('Product',{'fields':['name'],}),
        (None,{'fields':['model_number'],}),
        (None,{'fields':['serial_number'],}),

    ]
    inlines = [CompanyInline]
    list_display = ('name','model_number','serial_number','created_at','updated_at')

class ContractAdmin(admin.ModelAdmin):

     fieldsets = [
        ('Contract',{'fields':['contract_details'],}),
        (None,{'fields':['billing_info'],}),
    ] 

    list_display = ('created_at')


# Now register the new UserAdmin...
admin.site.register(User, UserAdmin)
admin.site.register(Company,CompanyAdmin)
admin.site.register(Product,ProductAdmin)
admin.site.register(Contract,ContractAdmin)

エラーの内容は以下の通りとなります。

list_display = ('created_at')
                                ^
IndentationError: unindent does not match any outer indentation level

こちらは調べた限りインデントが原因のエラーであるかと認識しているのですが、該当のコード付近を見直してみたのですが、インデントによる問題は見つかりません...
上記のエラーにつきまして、お気付きの点などありましたら、教えて頂けましたら幸いです。

Answer 1

12345
     fieldsets = [
        ('Contract',{'fields':['contract_details'],}),
        (None,{'fields':['billing_info'],}),
    ] 

1234
    list_display = ('created_at')

Comments

[ruuuu]

ご回答ありがとうございます。
インデントを1文字ずつ数えていきましたら、「fieldsets」の前が、半角1文字分空いていました...

Answer 2

list_display = ('created_at') 辺りでtabキーやspaceキーの問題でインデントエラーが起きてると思います