error-handling

问题 I have configured and set up a fully functional express-nextjs-graphql-apollo app that can login/logout a user, and perfectly do CRUD. The last and very important step is to display error messages on client-side. So far, I'm only getting this red error in a console: POST http://localhost:3000/graphql 500 (Internal Server Error) For example, a login form validation. When no input is provided, it's supposed to get an invalid input error message, or E-Mail is invalid if email format is incorrect

问题 I am learning Windows batch scripting. I need to raise errors when copy, move or delete operations fail. I have made a sample script and for some reason, when the operation fails I cannot get the ERRORLEVEL to rise. I run the script and the files either do not exist or are opened in another program and stderr messages are output to console, but ERRORLEVEL never rises, why is this? Also, is there any way to pipe stderr into a variable I could check, if I cannot get ERRORLEVEL to rise? My code

问题 I have an angular project version 10.0.2 I want to log all errors on developer console to elastic search. When I catch an error on the global error handler my handler inside like this. export class GlobalErrorHandlerService extends ErrorHandler { constructor(private log: LogService) { super(); } handleError(error: any) { var client = new Client(); if (error instanceof HttpErrorResponse) { this.log.level = LogLevel.Error; this.log.error("API/Back-End Proccess request error " + JSON.stringify

问题 How can I make sure that I print out the actual line that failed without including the whole traceback? The traceback might be too long for me too print it all. This code only prints the error in function a and b, but I want to see that the actual error occurred in function d. import traceback def a(): try: return b(); except: print traceback.format_exc(2) def b(): return c(); def c(): return d(); def d(): x = 1/0 a() 回答1: You can do something like this: import sys import traceback def a():

问题 How can I make sure that I print out the actual line that failed without including the whole traceback? The traceback might be too long for me too print it all. This code only prints the error in function a and b, but I want to see that the actual error occurred in function d. import traceback def a(): try: return b(); except: print traceback.format_exc(2) def b(): return c(); def c(): return d(); def d(): x = 1/0 a() 回答1: You can do something like this: import sys import traceback def a():

问题 I have found on several locations how to use Spring boot to make a custom error page but I cannot seem to figure out how to make it show a stack trace. This is what I have: @Bean public EmbeddedServletContainerCustomizer containerCustomizer() { return new EmbeddedServletContainerCustomizer() { @Override public void customize(ConfigurableEmbeddedServletContainer container) { ErrorPage error404Page = new ErrorPage(HttpStatus.NOT_FOUND, "/WEB-INF/jsp/app/404.jsp"); ErrorPage error500Page = new

问题 I have found on several locations how to use Spring boot to make a custom error page but I cannot seem to figure out how to make it show a stack trace. This is what I have: @Bean public EmbeddedServletContainerCustomizer containerCustomizer() { return new EmbeddedServletContainerCustomizer() { @Override public void customize(ConfigurableEmbeddedServletContainer container) { ErrorPage error404Page = new ErrorPage(HttpStatus.NOT_FOUND, "/WEB-INF/jsp/app/404.jsp"); ErrorPage error500Page = new

问题 I'm trying to make a formula and I got the error: $ operator not defined for this S4 class with R. First of all, what is a S4 class? What am I doing wrong? Following the code: as.formula("ctree(d$sex ~ d$ahe , data = d)") If you want to reproduce it, the dataset (CSV file) d is available here. 回答1: You are giving as.formula the wrong input here. Only d$sex ~ d$ahe should be a formula, so: ctree(as.formula("d$sex ~ d$ahe")) Or: ctree(as.formula("sex ~ ahe"), data = d) 来源： https://stackoverflow

问题 I've built a flask application and I try to catch unhandled application errors from my routes using the errorhandler decorator. I've a main.py which looks like this, app = Flask(__name__) api = Api(app) api.add_resource(Ping, '/ping') @app.errorhandler(500) def internal_server_error(error): print "caught internal server error" return "This page does not exist", 500 The route Ping is in another file, here is a sample version of the file class Ping(Resource): def get(self): raise return {}, 200

问题 I've built a flask application and I try to catch unhandled application errors from my routes using the errorhandler decorator. I've a main.py which looks like this, app = Flask(__name__) api = Api(app) api.add_resource(Ping, '/ping') @app.errorhandler(500) def internal_server_error(error): print "caught internal server error" return "This page does not exist", 500 The route Ping is in another file, here is a sample version of the file class Ping(Resource): def get(self): raise return {}, 200