add customers

migrations/20240807135144_create_customer_table.down.fizz

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+drop_table("customers")

migrations/20240807135144_create_customer_table.up.fizz

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+create_table("customers") {
+  t.Column("id", "integer", {primary: true})
+  t.Column("first_name", "string", {"size": 255})
+  t.Column("last_name", "string", {"size": 255})
+  t.Column("email", "string", {})
+}
+
+sql("alter table customers alter column created_at set default now();")
+sql("alter table customers alter column updated_at set default now();")

migrations/20240807135317_add_cols_to_transactions.down.fizz

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+drop_column("transactions", "expiry_month")
+drop_column("transactions", "expiry_year")
+

migrations/20240807135317_add_cols_to_transactions.up.fizz

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+add_column("transactions", "expiry_month", "integer", {"default":0})
+add_column("transactions", "expiry_year", "integer", {"default":0})
+

migrations/20240807135724_add_customer_id_to_orders.down.fizz

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+drop_column("orders", "customer_id")

migrations/20240807135724_add_customer_id_to_orders.up.fizz

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+add_column("orders", "customer_id", "integer", {"unsigned":true})
+
+add_foreign_key("orders", "customer_id", {"customers": ["id"]}, {
+        "on_delete": "cascade",
+        "on_update": "cascade",
+})