在Django中保存重复的记录

问题描述

我开始学习django，我有这个新手问题：
我必须建模模型之间的关系是一对多。一个提供者必须有很多DetailLoad。

I starting to learn django and I have this newbie issue:I have to models the relation between the model is one to many. One provider must have many DetailLoad.

我为DetailLoad创建一个表单，我只需要保存id_proveedor（FK），anio和mes。
但是当我尝试保存表单时，验证错误将显示详细信息此提供程序的加载程序已存在

I create a form for the DetailLoad where I only need to save the id_proveedor (FK), anio and mes.But when I try to save the form a validation error is displayed "detail Load for this provider already exists".

模型


$ b

Models.py

    class Provider(models.Model):
        id_proveedor = models.AutoField(primary_key=True, db_column='id_proveedor')
        nombre = models.CharField(max_length=50, blank=True)
        tipo = models.CharField(max_length=50, blank=True)
        asignado_a = models.CharField(max_length=15, blank=True, verbose_name='Asignado a')
        moneda = models.CharField(max_length=1, blank=True)
        class Meta:
            managed = False
            db_table = 'mpc_proveedores'

        def __unicode__(self):
            return self.nombre

class DetailLoad(models.Model):
    id_proveedor = models.ForeignKey(Proveedor,db_column='id_proveedor', primary_key=True, verbose_name='Proveedor')
    anio = models.IntegerField(blank=True, null=True)
    mes = models.IntegerField(blank=True, null=True)
    f_carga = models.DateField(blank=True, null=True, verbose_name='Fecha de carga')
    usuario = models.CharField(max_length=15, blank=True)
    registros = models.FloatField(blank=True, null=True,verbose_name='Cant. de Registros')
    num_codigos = models.IntegerField(blank=True, null=True,verbose_name='Cant. codigos')
    lista_codigos = models.CharField(max_length=2500, blank=True, verbose_name='Lista de Codigos')
    class Meta:
        managed = False
        db_table = 'mpc_detalle_carga_archivo'

我用于保存数据的表单的定义：

the definition of the form that I use to save the data:

class NewDetLoadForm(forms.ModelForm):
      def __init__(self,*args,**kwargs):
       super(NewDetRecForm,self).__init__(*args,**kwargs)
       self.helper = FormHelper(self)
       self.helper.layout.append(Submit('save','Grabar'))
       self.helper.layout = Layout(
        Fieldset('',
                 'id_proveedor',
                 'anio',
                 'mes',
                 Submit('save','Grabar'),
                )
       )


      class Meta:
        model = DetalleRecepcion

我的观点：

def NewDetLoadView(request):
    if request.method == "POST":
       drform = NewDetLoadForm(request.POST or none)
       if drform.is_valid():
          drform.save()
          return HttpResponseRedirect('/monitor/')
    else:
       drform = NewDetLoadForm()

    return render_to_response('newdetload.html',locals(),
                               context_instance=RequestContext(request))

我需要能够保存记录，选择提供者并填充其他两个字段，即使是重复的行。
顺便说一下，遗留数据库，这些表没有约束或任何种类的关系另一个表。

I need to be capable to save records, selecting the provider and filling the other two fields even if are duplicate rows.By the way is a legacy database, the tables doesn't have constraints or any kind of relationship another tables.

提前感谢

推荐答案

在 DetailLoad 模型中，您正在设置 Proveedor ForeignKey，也使它成为主键。主键始终是唯一的，这就是为什么您不能添加另一个条目。您需要从

In the DetailLoad model you are setting Proveedor ForeignKey and also making it a primary key. The primary keys are always unique that is why you can not add another entry. You need to remove the primary_key=True from:

id_proveedor = models.ForeignKey(Proveedor,db_column='id_proveedor', primary_key=True, verbose_name='Proveedor')

在django中，主键被自动生成，您不需要在模型中定义它们。主键可以使用 id 或 pk 属性访问。

In django the primary keys are automatically generated and you don't need to define them in your models. The primary keys can be accessed with id or pk attribute.

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