Add ActiveRecord::Relation#or description to guides [ci skip]

1 files changed, 13 insertions, 0 deletions

diff --git a/guides/source/active_record_querying.md b/guides/source/active_record_querying.md
index 26d01d4ede..d1cbe506b4 100644
--- a/guides/source/active_record_querying.md
+++ b/guides/source/active_record_querying.md
@@ -557,6 +557,19 @@ In other words, this query can be generated by calling `where` with no argument,
 SELECT * FROM clients WHERE (clients.locked != 1)
 ```
 
+### OR Conditions
+
+`OR` condition between two relations can be build by calling `or` on the first relation
+and passing the second one as an argument.
+
+```ruby
+Client.where(locked: true).or(Client.where(orders_count: [1,3,5]))
+```
+
+```sql
+SELECT * FROM clients WHERE (clients.locked = 1 OR clients.orders_count IN (1,3,5))
+```
+
 Ordering
 --------