Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p><code>Rack::CommonLogger</code> won't provide a logger to your main app, it will just logs the request like Apache would do.</p> <p>Check the code by yourself: <a href="https://github.com/rack/rack/blob/master/lib/rack/common_logger.rb" rel="nofollow noreferrer">https://github.com/rack/rack/blob/master/lib/rack/common_logger.rb</a></p> <p>All <code>Rack</code> apps have the call method that get's invoked with the HTTP Request env, if you check the call method of this middleware this is what happens:</p> <pre><code>def call(env) began_at = Time.now status, header, body = @app.call(env) header = Utils::HeaderHash.new(header) log(env, status, header, began_at) [status, header, body] end </code></pre> <p>The <code>@app</code> in this case is the main app, the middleware is just registering the time the request began at, then it class your middleware getting the [status, header, body] triple, and then invoke a private log method with those parameters, returning the same triple that your app returned in the first place.</p> <p>The <code>logger</code> method goes like: </p> <pre><code>def log(env, status, header, began_at) now = Time.now length = extract_content_length(header) logger = @logger || env['rack.errors'] logger.write FORMAT % [ env['HTTP_X_FORWARDED_FOR'] || env["REMOTE_ADDR"] || "-", env["REMOTE_USER"] || "-", now.strftime("%d/%b/%Y %H:%M:%S"), env["REQUEST_METHOD"], env["PATH_INFO"], env["QUERY_STRING"].empty? ? "" : "?"+env["QUERY_STRING"], env["HTTP_VERSION"], status.to_s[0..3], length, now - began_at ] end </code></pre> <p>As you can tell, the <code>log</code> method just grabs some info from the request env, and logs in on a logger that is specified on the constructor call, if there is no logger instance then it goes to the <code>rack.errors</code> logger (it seems there is one by default)</p> <p>The way to use it (in your <code>config.ru</code>):</p> <pre><code>logger = Logger.new('log/app.log') use Rack::CommonLogger, logger run YourApp </code></pre> <p>If you want to have a common logger in all your app, you could create a simple logger middleware:</p> <pre><code>class MyLoggerMiddleware def initialize(app, logger) @app, @logger = app, logger end def call(env) env['mylogger'] = @logger @app.call(env) end end </code></pre> <p>To use it, on your <code>config.ru</code>:</p> <pre><code>logger = Logger.new('log/app.log') use Rack::CommonLogger, logger use MyLoggerMiddleware, logger run MyApp </code></pre> <p>Hope this helps.</p>
    singulars
    1. This table or related slice is empty.
    1. POUse Rack::CommonLogger in Sinatra
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USiain
    1. USRoman Gonzalez
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POUse Rack::CommonLogger in Sinatra
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COShouldn't the first line of MyLoggerMiddleware#call(env) be: env['rack.errors'] = @logger ?
      singulars
      1. PO
      1. USLawrence I. Siden
    2. COAlso, I don't want to log every request, just warnings and error messages. But I'd like it to be configurable so that I can set the level of logging, as in "debug", "info", "warnings", "errors", ... BTW - My app is not a Rails app. There is no config.ru file. It's a simple Sinatra app. I was hoping to use an existing standard, but can't figure out what that is. Maybe I have to take the CommonLogger you showed me and wing it on my own?
      singulars
      1. PO
      1. USLawrence I. Siden
    3. CO`config.ru` is a configuration file for Rack, not for Rails. Both Sinatra and Rails are Rack-based, so you can use `config.ru` in Sinatra applications as well.
      singulars
      1. PO
      1. USjafrog
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload