Re: ManyToMany quick question

I don't know why you're calling a ManyToManyField to Products a country name, but you shouldn't get a country_name field - the Imports table will contain all the data needed to associate countries with products.

What exactly do you want to be stored in the country_name field on the Countries model? If you want it to be the name of the country, it should be a separate field from the ManyToManyField altogether.

On Tuesday, April 1, 2014 10:21:18 AM UTC, willyhakim wrote:

Below is my models.py

My problem is when I syncdb (I have dropped the db couple times to start over)

the country_name field with m2m never shows in the db. what am I doing wrong? I am using postgres

class Products(models.Model):

    hs_number = models.CharField(primary_key=True, blank=True, max_length=4)

    product_descript = models.CharField(max_length=250)

    class Meta:

        db_table = "Products"

    def __unicode__(self):

        return self.hs_number

class Countries(models.Model):

    country_id = models.CharField(primary_key=True, max_length=2, blank=True)

    country_name = models.ManyToManyField(Products, through="Imports", blank=True)

    region = models.CharField(max_length=200)

class Imports(models.Model):

    hs_number = models.ForeignKey(Products)

    country_id = models.ForeignKey(Countries)

    imported_value2008 = models.DecimalField(max_digits=12, decimal_places=2, default=0.00)

    imported_value2009 = models.DecimalField(max_digits=12, decimal_places=2, default=0.00)

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