Add Prevent Writes With A Sandboxed Rails Console as a Rails til

Author: jbranchaud

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
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-_1150 TILs and counting..._
+_1151 TILs and counting..._
 
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@@ -723,6 +723,7 @@ _1150 TILs and counting..._
 - [Perform SQL Explain With ActiveRecord](rails/perform-sql-explain-with-activerecord.md)
 - [Polymorphic Path Helpers](rails/polymorphic-path-helpers.md)
 - [Pretend Generations](rails/pretend-generations.md)
+- [Prevent Writes With A Sandboxed Rails Console](rails/prevent-writes-with-a-sandboxed-rails-console.md)
 - [Query A Single Value From The Database](rails/query-a-single-value-from-the-database.md)
 - [Read In Environment-Specific Config Values](rails/read-in-environment-specific-config-values.md)
 - [Read-Only Models](rails/read-only-models.md)

rails/prevent-writes-with-a-sandboxed-rails-console.md

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+# Prevent Writes With A Sandboxed Rails Console
+
+I often open a `rails console` to play around with some data and make sure I
+understand how some models can be instantiated while respecting their
+associations. There are plenty of times where I've created some data in the
+`development` database that doesn't need to be there. It may even be incomplete
+data from a failed experiment.
+
+This data accumlates and clutters up the database.
+
+One way to avoid this is by running the console in a sandboxed mode. Include
+the `--sandbox` flag when starting up a session to do this.
+
+```bash
+$ rails console --sandbox
+Loading development environment in sandbox (Rails 5.2.6)
+Any modifications you make will be rolled back on exit
+[1] pry(main)>
+```
+
+This wraps the session in a transaction so that any writes to the database can
+be rolledback afterward.
+
+[source](https://dev.to/citizen428/rails-quick-tips-1-console-sandbox-4k0c)