Hello Guys (by the way Happy New Year everyone).
I'm having a problem writing a query to get product details, price and only
one image for every product.
I have tables like this:
*db.define_table('price_lists'*
* Field('name')*
* )*
*db.define_table('products',*
* Field('name'),*
* Field('description'),*
* ...)*
*db.define_table('product_prices',*
* Field('product_id',db.products),*
* Field('price_list_id',db.price_lists),*
* Field('price',type='decimal(14,6)')*
* )*
*db.defin_table('product_images',*
* Field('product_id',db.products),*
* Field('image',type='upload')*
I was doing this with sqlite and mysql:
*prod_query = (db.products.id==db.product_prices.product_id) &*
* (db.product_prices.price_list_id==current_list_id)*
*products =
db(prod_query).select(left=db.product_images.on(db.products.id==db.product_images.product_id),*
* groupby=db.products.id)*
but now that we tested with postgres it just wont work, so I fixed the
query with the following:
*prod_query = (db.products.id==db.product_prices.product_id) &*
* (db.product_prices.price_list_id==current_list_id)*
*products =
db(prod_query).select(left=db.product_images.on(db.products.id==db.product_images.product_id),*
* groupby=db.products.id|db.product_prices.id|db.product_images.id)*
but then if a product has two prices or images it will appear more than
once.
How can I fix it for postgres??? I have search the forum but haven't found
anything like this.
Thanks.
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