All of the products will share the same fields.
I would filter on products, but my searches would only be restricted to one
market at a time.
On Sun, May 13, 2018 at 1:51 AM, Ryan Nowakowski <tuba...@fattuba.com>
wrote:
>
>
> On May 10, 2018 7:40:47 AM CDT, Matt Snelgar <snelg...@gmail.com> wrote:
> >
> >
> >I am making a django app to browse available products at different
> >markets.
> >I am getting data for my models from a JSON url feed,
> >
> >I am not sure on the best approach to turn this data into models as the
> >
> >feed for a single market can contain upwards of 50k items.
> >
> >
> >Models - feel free to suggest any improvements on these
> >
> ># Details of a sellable products
> >class Product(models.Model):
> > item = models.IntegerField(primary_key=True, auto_created=False)
> >name = models.CharField(max_length=40)
> >
> ># Market where products can be bought, some markets will cater to
> >multiple suburbs.
> >class Market(models.Model):
> >id = models.IntegerField(primary_key=True, auto_created=True)
> >name = models.CharField(max_length=40)
> >
> ># Nearby suburbs can share the one market
> >class Suburb(models.Model):
> >name = models.CharField(max_length=30)
> >market = models.ForeignKey(Market, on_delete=models.SET_NULL,
> >null=True)
> >
> ># Actual product for sale
> >class ProductForSale(models.Model):
> >sale = models.IntegerField(primary_key=True)
> >product = models.ForeignKey(Product, on_delete=models.SET_NULL,
> >null=True)
> >cost = models.IntegerField(default=1)
> >owner = models.CharField(max_length=30)
> >quantity = models.IntegerField(default=1)
> >market = models.ForeignKey(Market,on_delete=models.SET_NULL, null=True
> >)
> >Feed of markets products example
> >
> >"market_products": [
> >{
> >"id":11654,
> >"item":123,
> >"owner":"Bob",
> >"suburb":"Springvale",
> >"cost":3,
> >"quantity":1,
> >
> >},
> >{
> >"id":11655,
> >"item":123,
> >"owner":"Sarah",
> >"suburb":"Sunnyville",
> >"cost":5,
> >"quantity":2,
> >
> >},
> >
> >This is how I am trying to populate my ProductForSale models - I don't
> >know
> >if this is the correct approach for the Product FK, or how to link the
> >suburb to its Market FK
> >
> >markets = Market.objects.all()
> >for market in markets:
> >url = "jsonurl"
> >response = urllib.request.urlopen(url)
> >data = json.loads(response.read())
> >for entry in data['market_products']:
> >new_product_sale = ProductForSale.objects.create(
> >product = Product.objects.get(item=entry['item']),
> >cost = entry['cost'],
> >owner = entry['owner'],
> >quantity = entry['quantity']
> >)
> >new_product_sale.save()
> >
> >Is there a point where I should create a separate model for each
> >markets
> >products, or is it fine to house them all in the one model?
>
> Do products from different markets have many different fields? Or are
> most of the fields common?
>
> Do you need to be able to filter on products across markets? Or are most
> of your product queries specific to a particular market?
>
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