【发布时间】：2018-10-21 17:30:41
【问题描述】：
我正在使用 Ruby 进行 API GET 调用 - 调用是针对学习管理系统并返回以下 JSON：
{
"id": 12345,
"body": null,
"url": null,
"grade": "75",
"score": 75,
"submitted_at": "2020-05-02T11:30:53Z",
"assignment_id": 9876,
"user_id": 1111,
"submission_type": "online_upload",
"workflow_state": "graded",
"grade_matches_current_submission": true,
"graded_at": "2017-06-05T08:47:49Z",
"grader_id": 2222,
"attempt": 1,
"cached_due_date": "2020-05-03T15:00:00Z",
"excused": false,
"late_policy_status": null,
"points_deducted": null,
"grading_period_id": null,
"late": false,
"missing": false,
"seconds_late": 0,
"entered_grade": "75",
"entered_score": 75,
"preview_url": "https://etcetc",
"turnitin_data": {
"attachment_33333": {
"status": "scored",
"object_id": "44444444",
"similarity_score": 0,
"web_overlap": 0,
"publication_overlap": 0,
"student_overlap": 0,
"state": "none"
}
},
"attachments": [
{
"id": 33333,
"uuid": "kjsdkjhsdfkhsfd",
"folder_id": 55555,
"display_name": "Submission.pdf",
"filename": "Submission.pdf",
"content-type": "application/pdf",
"url": "https://etcetc",
"size": 2668226,
"created_at": "2020-05-02T11:30:51Z",
"updated_at": "2020-06-06T15:01:46Z",
"unlock_at": null,
"locked": false,
"hidden": false,
"lock_at": null,
"hidden_for_user": false,
"thumbnail_url": null,
"modified_at": "2020-05-02T11:30:51Z",
"mime_class": "pdf",
"media_entry_id": null,
"locked_for_user": false,
"preview_url": "api/etcetc"
}
],
"submission_comments": [
{
"id": 99999,
"comment": "here’s a comment",
"author_id": 1,
"author_name": "Mickey Mouse",
"created_at": "2020-05-15T12:54:08Z",
"edited_at": null,
"avatar_path": "/images/users/1",
"author": {
"id": 1,
"display_name": " Mickey Mouse ",
"avatar_image_url": "https://etcetc",
"html_url": "https://etcetc"
}
},
{
"id": 223344,
"comment": "another comment",
"author_id": 2,
"author_name": "Donald Duck",
"created_at": "2020-06-05T10:48:51Z",
"edited_at": null,
"avatar_path": "/images/users/2",
"author": {
"id": 2,
"display_name": "Donald Duck",
"avatar_image_url": "https://etcetc",
"html_url": "https://etcetc"
}
}
]
}
我需要能够从“submission_cmets”中检索特定值，即“comment”、“author_id”和“author_name”的值。目前我能做的最好的就是将“submission_cmets”作为一个大实体来检索。这是我如何做到这一点的：
require 'typhoeus'
require 'link_header'
require 'json'
require 'csv'
the_url = 'https://etctetc'
token = 'mytoken'
api_endpoint = '/api/etc'
output_csv = 'C:\Users\me\Desktop\Ruby Canvas course\assignment_comments.csv'
CSV.open(output_csv, 'wb') do |csv|
csv << ["user_id", "TII", "marker"]
end
request_url = "#{the_url}#{api_endpoint}"
count = 0
more_data = true
while more_data
get_comments = Typhoeus::Request.new(
request_url,
method: :get,
headers: { authorization: "Bearer #{token}" }
)
get_comments.on_complete do |response|
#get next link
links = LinkHeader.parse(response.headers['link']).links
next_link = links.find { |link| link['rel'] == 'next' }
request_url = next_link.href if next_link
if next_link && "#{response.body}" != "[]"
more_data = true
else
more_data = false
end
if response.code == 200
data = JSON.parse(response.body)
data.each do |comments|
CSV.open(output_csv, 'a') do |csv|
csv << [comments['id'], comments['turnitin_data'], comments['submission_comments']]
end
end
else
puts "Something went wrong! Response code was #{response.code}"
end
end
get_comments.run
end
puts "Script done running"
我是新手（ruby 代码基于练习，所以我可能无法完全理解）- 任何帮助/建议将不胜感激！
编辑：我还应该注意，这不是我正在处理的全部 JSON 响应 - 这只是返回的十个项目之一
【问题讨论】：
-
只是想添加一个道歉，我确实试图让 JSON 以上面“漂亮”的形式呈现，但这似乎没有用:(
-
您唯一缺少的是将每行缩进 4 个空格（选择块并按 cmd+k）。 FTFY。
-
那么你的问题是关于如何在 ruby 中从 JSON 中检索一个值？也许您可以删除 API 调用酱，这对您的主题来说似乎是不必要的。