回答編集履歴
1
追記
answer
CHANGED
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@@ -6,4 +6,23 @@
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6
6
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@users = User.all.
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7
7
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を
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8
8
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@users = User.includes(:orders).all.
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9
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-
にしないとDBに負担がかかります
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9
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+
にしないとDBに負担がかかります
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10
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+
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11
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+
追記
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12
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+
```
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13
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def self.csv_attributes
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14
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["name", "tel", "email", "post_code", "prefectures",
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15
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"address_1", "address_2", "room_number", "created_at_date",
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16
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"updated_at_date", "orders_counts"]
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17
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end
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18
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def orders_counts
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19
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orders.count
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20
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end
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21
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```
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22
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def self.generate_csv の方は
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23
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```
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24
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joins(:orders).each do |user|
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25
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csv << csv_attributes.map{ |attr| user.send(attr) }
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26
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end
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27
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```
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28
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でどうかな
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