Jak vytvořit migrační kolejnice

Příklady kódu

4
0

změnit sloupec kolejnice příklad

def change
    change_column(:table_name, :column_name, :new_type)
end
4
0

jak vytvořit migrační kolejnice

rails g migration AddPartNumberToProducts
1
0

ruby on rails db migrovat

rails db:migrate

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