Add Set Schema Search Path as a rails til

Author: jbranchaud

README.md

@@ -198,6 +198,7 @@ _310 TILs and counting..._
 - [Retrieve An Object If It Exists](rails/retrieve-an-object-if-it-exists.md)
 - [Select A Select By Selector](rails/select-a-select-by-selector.md)
 - [Select Value For SQL Counts](rails/select-value-for-sql-counts.md)
+- [Set Schema Search Path](rails/set-schema-search-path.md)
 - [Show Pending Migrations](rails/show-pending-migrations.md)
 - [Show Rails Models With Pry](rails/show-rails-models-with-pry.md)
 - [Show Rails Routes With Pry](rails/show-rails-routes-with-pry.md)

rails/set-schema-search-path.md

@@ -0,0 +1,16 @@
+# Set Schema Search Path
+
+By default the schema search path for a PostgreSQL database is going to be
+`"$user", public`. Tables created by a Rails migration are going to end up
+on the `public` schema by default. If your application has other schemas in
+play, then you may want to ensure that those schemas are also on the schema
+search path. This can be accomplished by adding the `schema_search_path`
+setting to your `database.yml` file. For instance, to include both the
+`legacy` and `public` schema in the Postgres search path, add the following
+line:
+
+```ruby
+schema_search_path: "legacy,public"
+```
+
+h/t Jack Christensen