ExpressJS对象PUT,DELETE没有方法'toLowerCase'

时间:2013-10-20 06:37:17

标签: javascript object express pug

当我尝试在Express中执行PUT请求时,它会给我错误,我不确定它的含义。

这是我的玉:

extends layout

block content
    form(method="post" action="/meals/#{meal[0].id}", id="mealForm")
        input(type="hidden", name="_method", value="PUT")

        h4 Meal Type
        input.span3(id="mealType", type="text", name="MealType", value="#{meal[0].meal_type}")

        br 

        h4 Meal Details
        input.span3(id="mealDetails", type="text", name="MealDetails", value="#{meal[0].meal_details}")

        br

        input.btn(type="submit", class="btn btn-primary btn-lg" value="Update")

        form(method="post" action="/meals/#{meal[0].meal_id}", id="mealForm")
            input(type="hidden", name="_method", value="DELETE")

            input.btn(type="submit", class="btn btn-danger btn-lg" style='margin-left: 1px;' value="Delete")

我不明白为什么这不起作用。这是我的app.js:

app.put('/meals/:id', meal.getMeal)

在meal.js

exports.getMeal = function(req, res){
  console.log('sa')
  id = req.params.id

  query = "Select * \
      From nutrition \
      Where id=%"

  query = query.replace(/%/g, id)

  db.query(query, function(err, row) {
        console.log(query);
        if (err) console.log(err)
        res.render('edit', { meal: row });
})
}

堆栈追踪:

500 TypeError: Object PUT,DELETE has no method 'toLowerCase'
at Object.methodOverride [as handle] (\middleware\methodOverride.js:37:30)

1 个答案:

答案 0 :(得分:2)

您的问题是您将HTML表单嵌套在Jade模板中。 你基本上做的是:

<form method="post" action="/meals/#{meal[0].id}" id="mealForm">
  <input type="hidden" name="_method" value="PUT">
  <form method="post" action="/meals/#{meal[0].meal_id}" id="mealForm">
    <input type="hidden" name="_method" value="DELETE">
  </form>
</form>

表格不能嵌套。您可以在一个页面上拥有更多这些页面,但它们不能重叠或嵌套。例如:

<form method="post" action="/meals/#{meal[0].id}" id="mealForm">
  <input type="hidden" name="_method" value="PUT">
</form>
<form method="post" action="/meals/#{meal[0].meal_id}" id="mealForm">
  <input type="hidden" name="_method" value="DELETE">
</form>

您的代码的副作用是它然后发送到Express作为数组[“PUT”,“DELETE”](因为您的表单中有两个_method字段 - 第二个嵌套表单被忽略)而不是“ PUT“或”删除“。 Express尝试将接收的方法转换为小写进行比较,但是Array没有String的方法toLowerCase。

你可能只需修复你的Jade模板缩进:

extends layout

block content
    form(method="post" action="/meals/#{meal[0].id}", id="mealForm")
        input(type="hidden", name="_method", value="PUT")

        h4 Meal Type
        input.span3(id="mealType", type="text", name="MealType", value="#{meal[0].meal_type}")

        br 

        h4 Meal Details
        input.span3(id="mealDetails", type="text", name="MealDetails", value="#{meal[0].meal_details}")

        br

        input.btn(type="submit", class="btn btn-primary btn-lg" value="Update")

    form(method="post" action="/meals/#{meal[0].meal_id}", id="mealForm")
        input(type="hidden", name="_method", value="DELETE")

        input.btn(type="submit", class="btn btn-danger btn-lg" style='margin-left: 1px;' value="Delete")