Ruby-on-rails 查找数组元素
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find array element
提问by alex
I have an array
我有一个数组
@words = Word.find_all_by_lesson_id(params[:id]) - @user.words
and want to find one element by word_id, something like
并希望通过 word_id 找到一个元素，例如
@current_word = @words[params[:id2].to_i]
where
params[:id2]is words.id
这里
params[:id2]是words.id
Of course it's wrong, because the arrays index is not the same as words.id,
so how can I do it correct?
当然是错误的，因为数组索引与 不一样words.id，那么我该怎么做才能正确呢？
OR
或者
can you advice me on how to work with the model if I want to exclude some records from it?
如果我想从中排除一些记录，你能就如何使用模型提出建议吗？
回答by megas
@current_word = @words.detect{|w| w.id == params[:id2]}
