Question

我将Sequel与Padrino一起使用，以下迁移引发了uninitialized constant Jsonb (NameError)错误：

Sequel.migration do
  up do
    alter_table :same_table do
      add_column :not_working, Jsonb
    end
  end
end

销售表的create_table迁移使用了Jsonb而没有问题：

Sequel.migration do
  up do
    create_table :same_table do
      Jsonb :worked
    end
  end
end

Answer 1

如Sequel source code所示，列类型不应大写。通常，DSL是关于定义类方法，而不是常量。

clear
set more off

*----- example data -----

sysuse auto

*----- two-variable example -----

eststo clear

// process price
estpost summarize price
matrix mymat = e(mean), e(count)

// process mpg
estpost summarize mpg if mpg > 15
matrix mymat = mymat \ e(mean), e(count)

// finish formatting matrix
matrix colnames mymat = mean count
matrix rownames mymat = price mpg
matrix list mymat

// tabulate
esttab matrix(mymat), nomtitles

续集迁移：未初始化的常量Jsonb（NameError）

1 个答案: