fix: Hide Attribute filters if 'Hide Variants' is enabled in E Commerce Settings

- Hide Attribute filters if 'Hide Variants' is enabled in E Commerce Settings
- Consider 'Hide Variants' in ProductQuery Engine
- Added docstrings
- Remove `get_e_commerce_settings`, redundant

erpnext/shopping_cart/filters.py

@@ -1,8 +1,6 @@
-# Copyright (c) 2020, Frappe Technologies Pvt. Ltd. and Contributors
+# Copyright (c) 2021, Frappe Technologies Pvt. Ltd. and Contributors
 # License: GNU General Public License v3. See license.txt
 
-from __future__ import unicode_literals
-
 import frappe
 
 
@@ -16,6 +14,8 @@ class ProductFiltersBuilder:
 		self.item_group = item_group
 
 	def get_field_filters(self):
+		if not self.doc.enable_field_filters: return
+
 		filter_fields = [row.fieldname for row in self.doc.filter_fields]
 
 		meta = frappe.get_meta('Item')
@@ -56,6 +56,8 @@ class ProductFiltersBuilder:
 		return filter_data
 
 	def get_attribute_filters(self):
+		if not self.doc.enable_attribute_filters: return
+
 		attributes = [row.attribute for row in self.doc.filter_attributes]
 
 		if not attributes:

erpnext/shopping_cart/product_query.py

@@ -42,6 +42,9 @@ class ProductQuery:
 		if fields: self.build_fields_filters(fields)
 		if search_term: self.build_search_filters(search_term)
 
+		if self.settings.hide_variants:
+			self.conditions += " and wi.variant_of is null"
+
 		result = []
 		website_item_groups = []
 
@@ -53,7 +56,6 @@ class ProductQuery:
 				filters=[["Website Item Group", "item_group", "=", item_group]]
 			)
 
-		self.query_fields = (", ").join(self.fields)
 		if attributes:
 			result = self.query_items_with_attributes(attributes, start)
 		else:
@@ -70,6 +72,8 @@ class ProductQuery:
 
 	def query_items(self, conditions, or_conditions, substitutions, start=0):
 		"""Build a query to fetch Website Items based on field filters."""
+		self.query_fields = (", ").join(self.fields)
+
 		return frappe.db.sql("""
 			select distinct {query_fields}
 			from