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-rw-r--r--guides/source/association_basics.md2
1 files changed, 1 insertions, 1 deletions
diff --git a/guides/source/association_basics.md b/guides/source/association_basics.md
index 8ef982f8c5..91b268d766 100644
--- a/guides/source/association_basics.md
+++ b/guides/source/association_basics.md
@@ -340,7 +340,7 @@ class CreateAssembliesAndParts < ActiveRecord::Migration
t.timestamps
end
- create_table :assemblies_parts do |t|
+ create_table :assemblies_parts, id: false do |t|
t.belongs_to :assembly
t.belongs_to :part
end