diff --git a/app/models/exchange.rb b/app/models/exchange.rb
index 3493ebecde..317b4a136c 100644
--- a/app/models/exchange.rb
+++ b/app/models/exchange.rb
@@ -29,7 +29,7 @@ class Exchange < ActiveRecord::Base
   scope :involving, lambda { |enterprises| where('exchanges.receiver_id IN (?) OR exchanges.sender_id IN (?)', enterprises, enterprises).select('DISTINCT exchanges.*') }
   scope :supplying_to, lambda { |distributor| where('exchanges.incoming OR exchanges.receiver_id = ?', distributor) }
   scope :with_variant, lambda { |variant| joins(:exchange_variants).where('exchange_variants.variant_id = ?', variant) }
-  scope :with_any_variant, lambda { |variants| joins(:exchange_variants).where('exchange_variants.variant_id IN (?)', variants).select('DISTINCT exchanges.*') }
+  scope :with_any_variant, lambda { |variant_ids| joins(:exchange_variants).where('exchange_variants.variant_id IN (?)', variant_ids).select('DISTINCT exchanges.*') }
   scope :with_product, lambda { |product| joins(:exchange_variants).where('exchange_variants.variant_id IN (?)', product.variants_including_master) }
   scope :by_enterprise_name, -> {
     joins('INNER JOIN enterprises AS sender   ON (sender.id   = exchanges.sender_id)').
diff --git a/app/models/order_cycle.rb b/app/models/order_cycle.rb
index 707bdae56a..262c6c7998 100644
--- a/app/models/order_cycle.rb
+++ b/app/models/order_cycle.rb
@@ -52,7 +52,7 @@ class OrderCycle < ActiveRecord::Base
     if user.has_spree_role?('admin')
       scoped
     else
-      where('coordinator_id IN (?)', user.enterprises)
+      where('coordinator_id IN (?)', user.enterprises.map(&:id))
     end
   }
 
@@ -217,7 +217,7 @@ class OrderCycle < ActiveRecord::Base
   end
 
   def exchanges_supplying(order)
-    exchanges.supplying_to(order.distributor).with_any_variant(order.variants)
+    exchanges.supplying_to(order.distributor).with_any_variant(order.variants.map(&:id))
   end
 
   def coordinated_by?(user)
diff --git a/lib/open_food_network/order_cycle_permissions.rb b/lib/open_food_network/order_cycle_permissions.rb
index a75c27bad6..db0d4428ac 100644
--- a/lib/open_food_network/order_cycle_permissions.rb
+++ b/lib/open_food_network/order_cycle_permissions.rb
@@ -55,7 +55,7 @@ module OpenFoodNetwork
           # TODO: Remove this when all P-OC are sorted out
           # Any hubs that currently have outgoing exchanges distributing variants of producers I manage
           variants = Spree::Variant.joins(:product).where('spree_products.supplier_id IN (?)', managed_enterprises.is_primary_producer)
-          active_exchanges = @order_cycle.exchanges.outgoing.with_any_variant(variants)
+          active_exchanges = @order_cycle.exchanges.outgoing.with_any_variant(variants.select("spree_variants.id"))
           hubs_active = active_exchanges.map(&:receiver_id)
 
           # TODO: Remove this when all P-OC are sorted out
@@ -249,7 +249,7 @@ module OpenFoodNetwork
       # outgoing exchange to those where the producer had granted P-OC to the distributor
       # For any of my managed producers, any outgoing exchanges with their variants
       variants = Spree::Variant.joins(:product).where('spree_products.supplier_id IN (?)', producers)
-      active_exchanges = @order_cycle.exchanges.outgoing.with_any_variant(variants).pluck :id
+      active_exchanges = @order_cycle.exchanges.outgoing.with_any_variant(variants.select("spree_variants.id")).pluck :id
 
       permitted_exchanges | active_exchanges
     end
diff --git a/lib/open_food_network/products_cache.rb b/lib/open_food_network/products_cache.rb
index b1118cd80d..b818b6bdf8 100644
--- a/lib/open_food_network/products_cache.rb
+++ b/lib/open_food_network/products_cache.rb
@@ -5,13 +5,13 @@ require 'open_food_network/products_cache_refreshment'
 module OpenFoodNetwork
   class ProductsCache
     def self.variant_changed(variant)
-      exchanges_featuring_variants(variant).each do |exchange|
+      exchanges_featuring_variants(variant.id).each do |exchange|
         refresh_cache exchange.receiver, exchange.order_cycle
       end
     end
 
     def self.variant_destroyed(variant, &block)
-      exchanges = exchanges_featuring_variants(variant).to_a
+      exchanges = exchanges_featuring_variants(variant.id).to_a
 
       block.call
 
@@ -21,13 +21,13 @@ module OpenFoodNetwork
     end
 
     def self.product_changed(product)
-      exchanges_featuring_variants(product.variants).each do |exchange|
+      exchanges_featuring_variants(product.variants.map(&:id)).each do |exchange|
         refresh_cache exchange.receiver, exchange.order_cycle
       end
     end
 
     def self.product_deleted(product, &block)
-      exchanges = exchanges_featuring_variants(product.reload.variants).to_a
+      exchanges = exchanges_featuring_variants(product.reload.variants.map(&:id)).to_a
 
       block.call
 
@@ -37,7 +37,7 @@ module OpenFoodNetwork
     end
 
     def self.variant_override_changed(variant_override)
-      exchanges_featuring_variants(variant_override.variant, distributor: variant_override.hub).each do |exchange|
+      exchanges_featuring_variants(variant_override.variant.id, distributor: variant_override.hub).each do |exchange|
         refresh_cache exchange.receiver, exchange.order_cycle
       end
     end
@@ -52,7 +52,7 @@ module OpenFoodNetwork
         where(is_master: false, deleted_at: nil).
         where(product_id: products)
 
-      exchanges_featuring_variants(variants).each do |exchange|
+      exchanges_featuring_variants(variants.select(:id)).each do |exchange|
         refresh_cache exchange.receiver, exchange.order_cycle
       end
     end
@@ -94,17 +94,17 @@ module OpenFoodNetwork
     end
 
     def self.inventory_item_changed(inventory_item)
-      exchanges_featuring_variants(inventory_item.variant, distributor: inventory_item.enterprise).each do |exchange|
+      exchanges_featuring_variants(inventory_item.variant.id, distributor: inventory_item.enterprise).each do |exchange|
         refresh_cache exchange.receiver, exchange.order_cycle
       end
     end
 
     private
 
-    def self.exchanges_featuring_variants(variants, distributor: nil)
+    def self.exchanges_featuring_variants(variant_ids, distributor: nil)
       exchanges = Exchange.
         outgoing.
-        with_any_variant(variants).
+        with_any_variant(variant_ids).
         joins(:order_cycle).
         merge(OrderCycle.dated).
         merge(OrderCycle.not_closed)
diff --git a/spec/models/exchange_spec.rb b/spec/models/exchange_spec.rb
index bd59675911..3966dbf8e9 100644
--- a/spec/models/exchange_spec.rb
+++ b/spec/models/exchange_spec.rb
@@ -240,7 +240,7 @@ describe Exchange do
       ex.variants << v1
       ex.variants << v2
 
-      expect(Exchange.with_any_variant([v1, v2, v3])).to eq([ex])
+      expect(Exchange.with_any_variant([v1.id, v2.id, v3.id])).to eq([ex])
     end
 
     it "finds exchanges with a particular product's master variant" do