docs: function (i) {
                      if (i >= columns.length) {
                          insertIntoDB();
                          return;
                      }
  
                      var dbField = columns[i];
                      var field = dbField.Field;
  
                      //Check required fields
                      if (dbField.Null === 'NO' && 
                          dbField.Default === '' && 
                          dbField.Extra !== 'auto_increment' && 
                          dbField.Extra.search('on update')===-1) {
  
                          //Check if field not set
                          if (undefOrEmpty(req.body[field])) {
                              return sendError(res,"Field " + field + " is NOT NULL but not specified in this request");
                          } else {
                              //Check if the set values are roughly okay
                              value = checkIfSentvaluesAreSufficient(req,dbField);
                              console.log(value);
                              if(value !== false) {
                                  //Value seems okay, go to the next field
                                  insertJson[field] = value;
                                  iterator(i + 1);
                              } else {
                                  return sendError(res,'Value for field ' + field + ' is not sufficient. Expecting ' + dbField.Type + ' but got ' + typeof req.body[field] );
                              }
                          }
                      }  else {
                          //Check for not required fields
                          //Skip auto_incremented fields
                          if(dbField.Extra === 'auto_increment') {
                              iterator(i + 1);
                          } else {
                              //Check if the field was provided by the client
                              var defined = false;
                              if(dbField.Default == "FILE") {
                                  if(req.files.hasOwnProperty(dbField.Field)) {
                                      defined = true;
                                  }
                              } else {
                                  if(typeof req.body[field] !== "undefined") {
                                      defined = true;
                                  }
                              }
  
                              //If it was provided, check if the values are okay
                              if(defined) {
                                  value = checkIfSentvaluesAreSufficient(req,dbField);
                                  if(value !== false) {
                                      insertJson[field] = value;
                                      iterator(i + 1);
                                  } else {
                                      if(dbField.Default == "FILE") {
                                          return sendError(res, 'Value for field ' + field + ' is not sufficient. Either the file is to large or an other error occured');
                                      } else {
                                          return sendError(res, 'Value for field ' + field + ' is not sufficient. Expecting ' + dbField.Type + ' but got ' + typeof req.body[field]);
                                      }
                                  }
                              } else {
                                  //If not, don't mind
                                  iterator(i + 1);
                              }
  
                          }
                      }
  
                  }