create_table "taggings", id: :serial, force: :cascade do |t|
t.integer "tag_id"
t.string "taggable_type"
t.integer "taggable_id"
t.string "tagger_type"
t.integer "tagger_id"
t.string "context", limit: 128
t.datetime "created_at"
t.index ["context"], name: "index_taggings_on_context"
t.index ["tag_id", "taggable_id", "taggable_type", "context", "tagger_id", "tagger_type"], name: "taggings_idx", unique: true
t.index ["tag_id"], name: "index_taggings_on_tag_id"
t.index ["taggable_id", "taggable_type", "context"], name: "index_taggings_on_taggable_id_and_taggable_type_and_context"
t.index ["taggable_id", "taggable_type", "tagger_id", "context"], name: "taggings_idy"
t.index ["taggable_id"], name: "index_taggings_on_taggable_id"
t.index ["taggable_type"], name: "index_taggings_on_taggable_type"
t.index ["tagger_id", "tagger_type"], name: "index_taggings_on_tagger_id_and_tagger_type"
t.index ["tagger_id"], name: "index_taggings_on_tagger_id"
end
create_table "tags", id: :serial, force: :cascade do |t|
t.string "name"
t.integer "taggings_count", default: 0
t.index ["name"], name: "index_tags_on_name", unique: true
end
これはOバージョンの問題であってもよいですfまたはgemを試してみてください
gem 'acts-as-taggable-on', '~> 4.0'