Add upgrade guide

xxx44yyy · May 25, 2017 · a344b2e · a344b2e
1 parent a765bd1
commit a344b2e
Showing 1 changed file with 13 additions and 0 deletions.
diff --git a/UPGRADE_GUIDE.md b/UPGRADE_GUIDE.md
@@ -0,0 +1,13 @@
+# Upgrade guide
+
+## v1.5.1 -> v1.5.2
+
+Version 1.5.2 adds are new column to the `impressions` table. If you're on v1.5.1 you need to manually add the new column using
+
+```
+add_column :impressions, :params, :text
+
+add_index :impressions, [:impressionable_type, :impressionable_id, :params], :name => "poly_params_request_index", :unique => false
+```
+
+before upgrading.