python – Django很多很多和管理员

我有一个 django ap,它有一个相当复杂的模型设置.我最终使用多级合成来创建分层模型.所有的关系是一对一的,所以我可以使用继承,但我选择不这样做,我将从我的模型的对象组成中受益,这意味着我可以做类似的事情

product.outerframe.top.cost

这使得我必须进行复杂的计算,组织得更好.

但是,这种模式安排使得使用django admin很棘手.我基本上有一个直通表,即外框表只是一堆外键到其他表(每个表都有唯一约束).我最终了解了ModelAdmin的add_view()和change_view()方法,这非常困难.

使用django管理员时,是否有更简单的方法来处理多对多/通过表格？

表格的排列方式如下：

产品>外框,内框,玻璃,其他

外框>顶部,底部,侧面等

内框架>顶部,侧面等

玻璃> glass_type等

其他>配件等

这是我的模特：

class Product(mixins.ProductVariables):
    name = models.CharField(max_length=255)
    sku = models.CharField(max_length=100,unique=True,db_index=True)
    image = thumbnail.ImageField(upload_to='product_images',blank=True)
    description = models.TextField(blank=True)
    group = models.ForeignKey('ProductGroup',related_name='products',null=True)
    hidden = models.BooleanField(default=False)
    product_specific_mark_up = models.DecimalField(default=1.0,max_digits=5,decimal_places=2)

    # Methods for totals
    def total_material_cost(self,width,height,options):
        return sum([
            self.outerframe.cost(width,options),self.innerframe.cost(width,self.glass.cost(width,self.other.cost(width,])

    def total_labour_time(self,options):
        return sum([
            self.outerframe.labour_time(width,self.innerframe.labour_time(width,self.glass.labour_time(width,self.other.labour_time(width,])

    def total_co2_output(self,options):
        return sum([
            self.outerframe.co2_output(width,self.innerframe.co2_output(width,self.glass.co2_output(width,self.other.co2_output(width,])

    @property
    def max_overall_width(self):
        return 1000

    @property
    def max_overall_height(self):
        return 1000

    def __unicode__(self):
        return self.name


class OuterFrame(models.Model,mixins.GetFieldsMixin,mixins.GetRelatedClassesMixin):
    top = models.OneToOneField(mixins.TopFrame)
    bottom = models.OneToOneField(mixins.BottomFrame)
    side = models.OneToOneField(mixins.SideFrame)
    accessories = models.OneToOneField(mixins.Accessories)
    flashing = models.OneToOneField(mixins.Flashing)
    silicone = models.OneToOneField(mixins.Silicone)

    product = models.OneToOneField(Product)

    def cost(self,options):
        #accessories_cost = (self.accessories.cost if options['accessories'] else 0)
        #flashing_cost = (self.flashing.cost if options['flashing'] else 0)
        #silicone_cost = (self.silicone.cost if options['silicone'] else 0)
        return sum([
            self.top.cost * (width / 1000),self.bottom.cost * (width / 1000),self.side.cost * (width*2 / 1000),#accessories_cost,#flashing_cost,#silicone_cost,])

    def labour_time(self,options):
        return datetime.timedelta(minutes=100)

    def CO2_output(self,options):
        return 100 # some kg measurement

    @classmethod
    def get_fields(cls):
        options = cls._meta
        fields = {}
        for field in options.fields:
            if field.name == 'product':
                continue
            if isinstance(field,models.OneToOneField):
                related_cls = field.rel.to
                related_fields = fields_for_model(related_cls,fields=related_cls.get_fields())
                fields.update( { related_cls.__name__ + '_' + name:field for name,field in related_fields.iteritems() })
        return fields



class InnerFrame(models.Model,mixins.GetRelatedClassesMixin):
    top = models.OneToOneField(mixins.TopFrame)
    bottom = models.OneToOneField(mixins.BottomFrame)
    side = models.OneToOneField(mixins.SideFrame)
    accessories = models.OneToOneField(mixins.Accessories)

    product = models.OneToOneField(Product)

    def cost(self,options):
        #accessories_cost = (self.accessories.cost if options['accessories'] else 0)
        print self.top.cost
        return sum([
            self.top.cost * (width / 1000),#    accessories_cost,options):
        return 100 # some kg measurement

class Glass(models.Model,mixins.GetRelatedClassesMixin):
    glass_type_a = models.OneToOneField(mixins.GlassTypeA)
    glass_type_b = models.OneToOneField(mixins.GlassTypeB)
    enhanced = models.OneToOneField(mixins.Enhanced)
    laminate = models.OneToOneField(mixins.Laminate)
    low_iron = models.OneToOneField(mixins.LowIron)
    privacy = models.OneToOneField(mixins.Privacy)
    anti_slip = models.OneToOneField(mixins.AntiSlip)
    heat_film_mirror = models.OneToOneField(mixins.HeatMirrorField)
    posished_edges = models.OneToOneField(mixins.PolishedEdges)

    product = models.OneToOneField(Product)

    def cost(self,options):
        return sum([
        ])

    def labour_time(self,options):
        return 100 # some kg measurement

class Other(models.Model,mixins.GetRelatedClassesMixin):
    num_packages = models.OneToOneField(mixins.NumberPackages)

    product = models.OneToOneField(Product)

    def cost(self,options):
        return 100

    def labour_time(self,options):
        return 100 # some kg measurement

混入：

class TimeCostMixin(models.Model,GetFieldsMixin):
    cost = models.DecimalField(default=0.0,max_digits=10,decimal_places=2)
    time = models.TimeField(default=datetime.timedelta(0))
    class Meta:
        abstract = True

##### Frame #####
class FrameComponentMixin(TimeCostMixin):
    external_width = models.IntegerField(default=0)
    material_weight = models.DecimalField(default=0.0,decimal_places=2)
    u_value = models.DecimalField(default=0.0,decimal_places=2)
    class Meta:
        abstract = True


class TopFrame(FrameComponentMixin):
    pass


class BottomFrame(FrameComponentMixin):
    pass


class SideFrame(FrameComponentMixin):
    pass


class Accessories(TimeCostMixin):
    material_weight = models.DecimalField(default=0.0,decimal_places=2)


class Flashing(TimeCostMixin):
    pass


class Silicone(TimeCostMixin):
    labour_time = models.DecimalField(default=0.0,decimal_places=2)
#################

##### Glass #####
class GlassTypeA(TimeCostMixin):
    material_weight = models.DecimalField(default=0.0,decimal_places=2)

class GlassTypeB(TimeCostMixin):
    material_weight = models.DecimalField(default=0.0,decimal_places=2)

class Enhanced(TimeCostMixin):
    material_weight = models.DecimalField(default=0.0,decimal_places=2)

class Laminate(TimeCostMixin):
    material_weight = models.DecimalField(default=0.0,decimal_places=2)

class LowIron(TimeCostMixin):
    pass

class Privacy(TimeCostMixin):
    pass

class AntiSlip(TimeCostMixin):
    pass

class HeatMirrorField(TimeCostMixin):
    u_value = models.DecimalField(default=0.0,decimal_places=2)

class PolishedEdges(models.Model):
    cost = models.DecimalField(default=0.0,decimal_places=2)
##################

##### other  #####
class NumberPackages(models.Model):
    number_of_packages = models.IntegerField(default=0)
##################

还有一个拉头管理员！

class ProductAdmin(AdminImageMixin,admin.ModelAdmin):
    inlines = [ProductDownloadInline,ProductConfigurationInline]

    add_form_template = 'admin/products/add_form.html'
    change_form_template = 'admin/products/add_form.html'


    @csrf_protect_m
    @transaction.atomic
    def add_view(self,request,form_url='',extra_context=None):
        extra_context = extra_context or {}

        "The 'add' admin view for this model."
        model = self.model
        opts = model._meta

        if not self.has_add_permission(request):
            raise PermissionDenied

        ModelForm = self.get_form(request)
        formsets = []
        inline_instances = self.get_inline_instances(request,None)
        if request.method == 'POST':
            form = ModelForm(request.POST,request.FILES)
            if form.is_valid():
                new_object = self.save_form(request,form,change=False)
                form_validated = True
            else:
                form_validated = False
                new_object = self.model()
            prefixes = {}
            for FormSet,inline in zip(self.get_formsets(request),inline_instances):
                prefix = FormSet.get_default_prefix()
                prefixes[prefix] = prefixes.get(prefix,0) + 1
                if prefixes[prefix] != 1 or not prefix:
                    prefix = "%s-%s" % (prefix,prefixes[prefix])
                formset = FormSet(data=request.POST,files=request.FILES,instance=new_object,save_as_new="_saveasnew" in request.POST,prefix=prefix,queryset=inline.get_queryset(request))
                formsets.append(formset)

            #####
            outer_frame_forms = [
                modelform_factory(cls)(request.POST,prefix='OuterFrame_'+cls.__name__)
                for cls in models.OuterFrame.get_related_classes(exclude=['product'])
            ]
            inner_frame_forms = [
                modelform_factory(cls)(request.POST,prefix='InnerFrame'+cls.__name__)
                for cls in models.InnerFrame.get_related_classes(exclude=['product'])
            ]
            glass_forms = [
                modelform_factory(cls)(request.POST,prefix='InnerFrame'+cls.__name__)
                for cls in models.Glass.get_related_classes(exclude=['product'])
            ]
            other_forms = [
                modelform_factory(cls)(request.POST,prefix='InnerFrame'+cls.__name__)
                for cls in models.Other.get_related_classes(exclude=['product'])
            ]
            #####

            if all_valid(formsets
                        +outer_frame_forms
                        +inner_frame_forms
                        +glass_forms
                        +other_forms
                        ) and form_validated:
                self.save_model(request,new_object,False)
                self.save_related(request,formsets,False)
                self.log_addition(request,new_object)

                ##### save object hierichy #####
                # inner frame
                inner_frame = models.InnerFrame()
                inner_frame.product = new_object
                mapping = {f.rel.to:f.name for f in models.InnerFrame._meta.fields if f.name not in ['id','product']}
                for f in inner_frame_forms:
                    obj = f.save()
                    setattr(inner_frame,mapping[obj.__class__],obj)
                inner_frame.save()
                # outer frame
                outer_frame = models.OuterFrame()
                outer_frame.product = new_object
                mapping = {f.rel.to:f.name for f in models.OuterFrame._meta.fields if f.name not in ['id','product']}
                for f in outer_frame_forms:
                    obj = f.save()
                    setattr(outer_frame,obj)
                outer_frame.save()
                # glass
                glass = models.Glass()
                glass.product = new_object
                mapping = {f.rel.to:f.name for f in models.Glass._meta.fields if f.name not in ['id','product']}
                for f in glass_forms:
                    obj = f.save()
                    setattr(glass,obj)
                glass.save()
                # other
                other = models.Other()
                other.product = new_object
                mapping = {f.rel.to:f.name for f in models.Other._meta.fields if f.name not in ['id','product']}
                for f in other_forms:
                    obj = f.save()
                    setattr(other,obj)
                other.save()
                #################################

                return self.response_add(request,new_object)
        else:
            forms = SortedDict({})
            forms['Outer Frame Variables'] = {
                cls.__name__: modelform_factory(cls)(prefix='OuterFrame_'+cls.__name__)
                for cls in models.OuterFrame.get_related_classes(exclude=['product'])
            }
            forms['Inner Frame Variables'] = {
                cls.__name__: modelform_factory(cls)(prefix='InnerFrame'+cls.__name__)
                for cls in models.InnerFrame.get_related_classes(exclude=['product'])
            }
            forms['Glass Variables'] = {
                cls.__name__: modelform_factory(cls)(prefix='InnerFrame'+cls.__name__)
                for cls in models.Glass.get_related_classes(exclude=['product'])
            }
            forms['Other Variables'] = {
                cls.__name__: modelform_factory(cls)(prefix='InnerFrame'+cls.__name__)
                for cls in models.Other.get_related_classes(exclude=['product'])
            }
            extra_context['forms'] = forms

            # Prepare the dict of initial data from the request.
            # We have to special-case M2Ms as a list of comma-separated PKs.
            initial = dict(request.GET.items())
            for k in initial:
                try:
                    f = opts.get_field(k)
                except models.FieldDoesNotExist:
                    continue
                if isinstance(f,models.ManyToManyField):
                    initial[k] = initial[k].split(",")
            form = ModelForm(initial=initial)
            prefixes = {}
            for FormSet,prefixes[prefix])
                formset = FormSet(instance=self.model(),queryset=inline.get_queryset(request))
                formsets.append(formset)

        adminForm = helpers.AdminForm(form,list(self.get_fieldsets(request)),self.get_prepopulated_fields(request),self.get_readonly_fields(request),model_admin=self)
        media = self.media + adminForm.media

        inline_admin_formsets = []
        for inline,formset in zip(inline_instances,formsets):
            fieldsets = list(inline.get_fieldsets(request))
            readonly = list(inline.get_readonly_fields(request))
            prepopulated = dict(inline.get_prepopulated_fields(request))
            inline_admin_formset = helpers.InlineAdminFormSet(inline,formset,fieldsets,prepopulated,readonly,model_admin=self)
            inline_admin_formsets.append(inline_admin_formset)
            media = media + inline_admin_formset.media

        context = {
            'title': _('Add %s') % force_text(opts.verbose_name),'adminform': adminForm,'is_popup': IS_POPUP_VAR in request.REQUEST,'media': media,'inline_admin_formsets': inline_admin_formsets,'errors': helpers.AdminErrorList(form,formsets),'app_label': opts.app_label,'preserved_filters': self.get_preserved_filters(request),}
        context.update(extra_context or {})
        return self.render_change_form(request,context,form_url=form_url,add=True)