如何找到没有外键的表？

Question

是否有查询或命令显示哪些表没有外键？

Answer 1

您可以查询信息架构：

var getApiAndToken, initializeSession;
​
getApiAndToken = function() {
  var apiKey, customer_id, sessionId, token;
  if (gon) {
    apiKey = gon.api_key;
  }
  if (gon) {
    sessionId = gon.session_id;
  }
  if (gon) {
    token = gon.token;
  }
  if (gon) {
    customer_id = gon.customer_id;
  }
  initializeSession();
};
​
initializeSession = function() {
  var publishStream, session;
  session = OT.initSession(apiKey, sessionId);
  session.connect(token, function(error) {
    if (!error) {
      session.publish(publishStream(true));
      layout();
    } else {
      console.log('There was an error connecting to the session', error.code, error.message);
    }
  });
  $('#audioInputDevices').change(function() {
    publishStream(false);
  });
  $('#videoInputDevices').change(function() {
    publishStream(false);
  });
  return publishStream = function(loadDevices) {
    var publisherOptions;
    publisherOptions = {
      audioSource: $('#audioInputDevices').val() || 0,
      videoSource: $('#videoInputDevices').val() || 0
    };
    OT.initPublisher('publisherContainer', publisherOptions, function(error) {
      if (error) {
        console.log(error);
      } else {
        if (loadDevices) {
          OT.getDevices(function(error, devices) {
            var audioInputDevices, videoInputDevices;
            audioInputDevices = devices.filter(function(element) {
              return element.kind === 'audioInput';
            });
            videoInputDevices = devices.filter(function(element) {
              return element.kind === 'videoInput';
            });
            $.each(audioInputDevices, function() {
              $('#audioInputDevices').append($('<option></option>').val(this['deviceId']).html(this['label']));
            });
            $.each(videoInputDevices, function() {
              $('#videoInputDevices').append($('<option></option>').val(this['deviceId']).html(this['label']));
            });
          });
        }
      }
    });
  };
};