Rails db: migrate

Przykłady kodu

5
0

rails g migration dodaj kolumny

$ rails generate migration AddDetailsToProducts part_number:string price:decimal
4
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jak tworzyć szyny migracyjne

rails g migration AddPartNumberToProducts
1
0

używanie SQL w migracji rails

def change
  execute <<-SQL
    UPDATE table1
    SET column1 = "value"
  SQL
end
1
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ruby on rails db migrate

rails db:migrate
1
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jak utworzyć tabelę SQL w ruby

def self.create_table
    sql = <<-SQL
      CREATE TABLE IF NOT EXISTS IF NOT EXISTS students (
        name TEXT,
        grade TEXT
      )
    SQL
    DB[:conn].execute(sql)
  end
0
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rials db down

bin/rails db:migrate:down VERSION=YYYYMMDDHHMMSS

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