对现有字段进行只读，但允许在django admin中创建新内联时添加 [英] Making readonly for existing field but allowing to add when new inline is created in django admin

问题描述

我有两个模型，其中一个与其他的内联。我已经做了内联模型的领域只读。

  class FollowUpInLine（admin.TabularInline）：
 model = md。跟随
 extra = 0 
 can_delete = False 
 
 def get_readonly_fields（self，request，obj = None）：
如果request.user.is_superuser == False：
如果obj：＃编辑现有对象
 return self.readonly_fields +（
'follow_up_date'，
'status_inquiry'，
'remarks'，
' followup_done_by'，
）
 return self.readonly_fields 
  

但是这不允许单击添加另一个时，添加新字段，而将其更改为带有无值的标签。
如何添加内容，但是添加下一行内容时呢？

解决方案

我找到了这个答案。我们需要插入一个构造窗体，然后从内联类中调用此窗体，如下所示：

  class RequiredInlineFormSet（BaseInlineFormSet）：

生成必需的内联formset 

 def _construct_form（self，i，** kwargs）：
 
覆盖更改表单属性的方法empty_permitted 

 form = super（RequiredInlineFormSet，self）._ construct_form（i，** kwargs）
 form。 empty_permitted = False 
 return form 
 
 class FollowUpAddInLine（admin.TabularInline）：
 model = md.FollowUp 
 extra = 1 
 formfield_overrides = {
 models.CharField：{'widget'：TextInput（attrs = {'size'：'20'}）}，
 models.TextField：{'widget'：Textarea（attrs = {'rows'：4 ，'cols'：40}）}，
} 
 
 can_delete = False 
 formset = RequiredInlineFormSet 
 
 def has_change_permission（self，请求，obj =无）：
返回False 
 
类FollowUpListInLine（admin.TabularInline）：
 model = md.FollowUp 
 readonly_fields =（'status'，' follow_up_date'，'followup_status'，'followup_reason'，'remarks'，'followup_done_by'）
 extra = 0 
 can_delete = False 
 formset = RequiredInlineFormSet 
 
 def has_add_permission （self，request）：
 return False 
 
 class FollowUpAdminInLine（admin.TabularInline）：
 model = md.FollowUp 
 extra = 1 
 formfield_overrides = {
 models.CharField：{'widget'：TextInput（attrs = {'size'：'20'}）}，
 models.TextField：{'widget'：Textarea（attrs = {'rows '：4，'cols'：40}）}，
} 
 
 formset = RequiredInlineFormSet 
 
 def queryset（self，request）：
 return md.FollowUp.objects.filter（owner = request.user）
 
 class PackageAdmin（admin.ModelAdmin）：
使Foll owUp与包
 inlines =（FollowUpListInLine，FollowUpAddInLine）一起添加
 fields =（'date_of_inquiry'，'agent_name'，'type_of_booking'，
'no_of_pax'，' source_of_inquiry'，'business_vendor'，
'travel_date'，'reply_date'，'client_name'，
'client_email'，'client_contacts'，'inquiry_assigned_to'，
'inquiry_assigned_by'）
 list_display =（'agent_name'，'date_of_inquiry'，'status_color'）
 list_filter =（'date_of_inquiry'）
 can_delete = False 
 list_per_page = 25 
 
 def get_readonly_fields（self，request，obj = None）：
如果request.user.is_superuser == False：
如果obj：＃编辑现有对象
 return self.readonly_fields +（
'agent_name'，
'date_of_inquiry'，
 ）
 
 else：
 self.inlines =（FollowUpAdminInLine，）
 return self.readonly_fields 
 
 def queryset（self，request）：
限制属于请求的用户的页面。
 qs = super（PackageAdmin，self）.queryset（request）
如果request.user.is_superuser：
 return qs 
 return qs.filter（inquiry_assigned_to = request.user）
 
 admin.site.register（md.Package，PackageAdmin）
  

I have two models with one of them as inline to other. I have made fields of inline model read only.

class FollowUpInLine(admin.TabularInline):
model = md.FollowUp
extra = 0
can_delete = False

def get_readonly_fields(self, request, obj=None):
    if request.user.is_superuser == False:          
        if obj: # editing an existing object
                return self.readonly_fields + (
                'follow_up_date',
                'status_inquiry',
                'remarks',
                'followup_done_by',
                )
    return self.readonly_fields

However this does not allows to add new fields when "Add another" is clicked in inline rather it changes them to label with value "None". How can I make fields inline but add when next inline is to added?

解决方案

I found the answer to this. We need to insert a construct form and then call this form from the inline class as I have done which is shown below:

class RequiredInlineFormSet(BaseInlineFormSet):
"""
Generates an inline formset that is required
"""
    def _construct_form(self, i, **kwargs):
    """
    Override the method to change the form attribute empty_permitted
    """
        form = super(RequiredInlineFormSet, self)._construct_form(i, **kwargs)
        form.empty_permitted = False
        return form

class FollowUpAddInLine(admin.TabularInline):
    model = md.FollowUp
    extra = 1
    formfield_overrides = {
    models.CharField: {'widget': TextInput(attrs={'size':'20'})},
    models.TextField: {'widget': Textarea(attrs={'rows':4, 'cols':40})},
}

    can_delete = False
    formset = RequiredInlineFormSet

    def has_change_permission(self, request, obj=None):
        return False

class FollowUpListInLine(admin.TabularInline):
    model = md.FollowUp
    readonly_fields = ('status', 'follow_up_date', 'followup_status', 'followup_reason', 'remarks', 'followup_done_by')
    extra = 0
    can_delete = False
    formset = RequiredInlineFormSet

    def has_add_permission(self, request):
        return False

class FollowUpAdminInLine(admin.TabularInline):
    model = md.FollowUp
    extra = 1
    formfield_overrides = {
    models.CharField: {'widget': TextInput(attrs={'size':'20'})},
    models.TextField: {'widget': Textarea(attrs={'rows':4, 'cols':40})},
}

    formset = RequiredInlineFormSet

    def queryset(self, request):
        return md.FollowUp.objects.filter(owner=request.user)

class PackageAdmin(admin.ModelAdmin):
"""Makes the FollowUp to be added along with the Package"""
    inlines =(FollowUpListInLine, FollowUpAddInLine)
    fields = ('date_of_inquiry', 'agent_name', 'type_of_booking',
                  'no_of_pax', 'source_of_inquiry', 'business_vendor',
              'travel_date', 'reply_date', 'client_name',
              'client_email', 'client_contacts', 'inquiry_assigned_to',
              'inquiry_assigned_by')
    list_display = ('agent_name', 'date_of_inquiry','status_color')
    list_filter = ('date_of_inquiry',)
    can_delete = False
    list_per_page = 25

    def get_readonly_fields(self, request, obj=None):
    if request.user.is_superuser == False:
        if obj: # editing an existing object
            return self.readonly_fields + (
                        'agent_name',
                        'date_of_inquiry',
                         )

        else:
            self.inlines = (FollowUpAdminInLine,)   
        return self.readonly_fields

    def queryset(self, request):
"""Limit Pages to those that belong to the request's user."""
        qs = super(PackageAdmin, self).queryset(request)
        if request.user.is_superuser:
           return qs
        return qs.filter(inquiry_assigned_to=request.user)

admin.site.register(md.Package,PackageAdmin)

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