User.column_names
Retrieving Rails Model Column Names
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User.column_names
A server is already running. Check tmp/pids/development.pid
Remove the file: tmp/pids/development.pid
TCPServer Error: Address already in use – bind(2)
lsof -wni tcp:3000
kill -9 PID
Based on a discussion on Ruby Forum here is an useful class for counting frequency of values in an array. So you can get easily the most frequent.
class Array def counts inject( Hash.new(0) ){ |hash,element| hash[ element ] +=1 hash } end def counts_up counts.sort_by{ |k,v| v } end def counts_down counts.sort_by{ |k,v| -v } end end a = ["a", "a", "a", "b", "c", "c"] p a.counts, a.counts_up, a.counts_down #=> {"a"=>3, "b"=>1, "c"=>2} #=> [["b", 1], ["c", 2], ["a", 3]] #=> [["a", 3], ["c", 2], ["b", 1]]
He’re a list of Http Status codes useful during testing Ruby On Rails applications.
Thanks to CodyFauser for this list that saved me a lot of time and no longer available on his blog.
Status Code | Status Message | Symbol |
---|---|---|
1xx Informational | ||
100 | Continue | :continue |
101 | Switching Protocols | :switching_protocols |
102 | Processing | :processing |
2xx Success | ||
200 | OK | :ok |
201 | Created | :created |
202 | Accepted | :accepted |
203 | Non-Authoritative Information | :non_authoritative_information |
204 | No Content | :no_content |
205 | Reset Content | :reset_content |
206 | Partial Content | :partial_content |
207 | Multi-Status | :multi_status |
226 | IM Used | :im_used |
3xx Redirection | ||
300 | Multiple Choices | :multiple_choices |
301 | Moved Permanently | :moved_permanently |
302 | Found | :found |
303 | See Other | :see_other |
304 | Not Modified | :not_modified |
305 | Use Proxy | :use_proxy |
307 | Temporary Redirect | :temporary_redirect |
4xx Client Error | ||
400 | Bad Request | :bad_request |
401 | Unauthorized | :unauthorized |
402 | Payment Required | :payment_required |
403 | Forbidden | :forbidden |
404 | Not Found | :not_found |
405 | Method Not Allowed | :method_not_allowed |
406 | Not Acceptable | :not_acceptable |
407 | Proxy Authentication Required | :proxy_authentication_required |
408 | Request Timeout | :request_timeout |
409 | Conflict | :conflict |
410 | Gone | :gone |
411 | Length Required | :length_required |
412 | Precondition Failed | :precondition_failed |
413 | Request Entity Too Large | :request_entity_too_large |
414 | Request-URI Too Long | :request_uri_too_long |
415 | Unsupported Media Type | :unsupported_media_type |
416 | Requested Range Not Satisfiable | :requested_range_not_satisfiable |
417 | Expectation Failed | :expectation_failed |
422 | Unprocessable Entity | :unprocessable_entity |
423 | Locked | :locked |
424 | Failed Dependency | :failed_dependency |
426 | Upgrade Required | :upgrade_required |
5xx Server Error | ||
500 | Internal Server Error | :internal_server_error |
501 | Not Implemented | :not_implemented |
502 | Bad Gateway | :bad_gateway |
503 | Service Unavailable | :service_unavailable |
504 | Gateway Timeout | :gateway_timeout |
505 | HTTP Version Not Supported | :http_version_not_supported |
507 | Insufficient Storage | :insufficient_storage |
510 | Not Extended | :not_extended |