Question

我正在尝试创建一个像这样的二维数组......

@transactions = {}
@expenses.each do |expense|
  @transactions[expense.id.to_s + '-expense'] = {'identifier' => expense.id.to_s + '-expense', 'id' => expense.id, 'type' => 'expense', 'issued_on' => expense.issued_on, 'amount' => expense.amount}
end

@invoices.each do |invoice|
  @transactions[invoice.id.to_s + '-invoice'] = {'identifier' => invoice.id.to_s + '-invoice', 'id' => invoice.id, 'type' => 'invoice', 'issued_on' => invoice.issued_on, 'amount' => invoice.total}
end

但是当我遍历数组来创建行时，它首先给出了键，然后是整个数组......

- 1-expense
- identifier: 1-expense
  id: 1
  type: expense
  issued_on: 2012-05-03
  amount: 8.99
---
- 2-expense
- identifier: 2-expense
  id: 2
  type: expense
  issued_on: 2012-05-25
  amount: 4.96
---
- 3-expense
- identifier: 3-expense
  id: 3
  type: expense
  issued_on: 2012-05-01
  amount: 56.08

我迭代创建行（当然，我应该做像transaction.id或transaction.issued_on这样的东西，但我调试，所以你可以看到我的意思）......

<% @transactions.each do |transaction| %>
  <tr class="<%= cycle("odd", "even") %>">
    <td>
      <%= debug transaction %>
    </td>
    <td></td>
    <td></td>
    <td></td>
  </tr>
  <% end %>

所以我最终得到了这样一张桌子......

| 1-expense |
| identifier: 1-expense, id: 1, type: expense, issued_on: 2012-05-03, amount: 8.99 |
| 2-expense |
| identifier: 2-expense, id: 2, type: expense, issued_on: 2012-05-25, amount: 4.96 |
| 3-expense |
| identifier: 3-expense, id: 3, type: expense, issued_on: 2012-05-01, amount: 56.08 |

当我的桌子应该看起来像这样

| identifier: 1-expense, id: 1, type: expense, issued_on: 2012-05-03, amount: 8.99 |
| identifier: 2-expense, id: 2, type: expense, issued_on: 2012-05-25, amount: 4.96 |
| identifier: 3-expense, id: 3, type: expense, issued_on: 2012-05-01, amount: 56.08 |

我不知道如何创建一个包含事务数据行的简单表，而不是那些带有哈希键的额外行。

Answer 1

您已使用{}语法创建了哈希，而不是数组。

如果你想迭代哈希的值（没有键），你可以这样做：

<% @transactions.each_value do |transaction| %>
...

或者，您可以使用数组来保存行：

@transactions = []
@expenses.each do |expense|
  @transactions << {'identifier' => expense.id.to_s + '-expense', 'id' => expense.id, 'type' => 'expense', 'issued_on' => expense.issued_on, 'amount' => expense.amount}
end

@invoices.each do |invoice|
  @transactions << {'identifier' => invoice.id.to_s + '-invoice', 'id' => invoice.id, 'type' => 'invoice', 'issued_on' => invoice.issued_on, 'amount' => invoice.total}
end

然后您现有的erb模板应该更好。

Ruby：迭代二维哈希

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