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145145});
146146</ code > </ pre >
147147<!-- prettier-ignore-end -->
148- </ span > </ div > </ article > </ div > < div class ="docs-prevnext "> < a class ="docs-prev button " href ="/docs/next/custom-validators-sanitizers.html "> < span class ="arrow-prev "> ← </ span > < span > Custom validators/sanitizers</ span > </ a > < a class ="docs-next button " href ="/docs/next/wildcards.html "> < span > Wildcards</ span > < span class ="arrow-next "> →</ span > </ a > </ div > </ div > </ div > < nav class ="onPageNav "> < ul class ="toc-headings "> < li > < a href ="#error-message-levels "> Error message levels</ a > < ul class ="toc-headings "> < li > < a href ="#validator-level "> Validator Level</ a > </ li > < li > < a href ="#custom-validator-level "> Custom Validator Level</ a > </ li > < li > < a href ="#field-level "> Field Level</ a > </ li > </ ul > </ li > < li > < a href ="#dynamic-messages "> Dynamic messages</ a > </ li > </ ul > </ nav > </ div > < footer class ="nav-footer " id ="footer "> < section class ="sitemap "> < a href ="/ " class ="nav-home "> < img src ="/img/logo.svg " alt ="express-validator " width ="66 " height ="58 "/> </ a > < div > < h5 > Docs</ h5 > < a href ="/docs/index.html "> Getting Started</ a > < a href ="/docs/check-api.html "> API Reference</ a > </ div > < div > < h5 > Community</ h5 > < a href ="http://stackoverflow.com/questions/tagged/express-validator " target ="_blank " rel ="noreferrer noopener "> Stack Overflow</ a > </ div > < div > < h5 > More</ h5 > < a href ="https://github.com/express-validator/express-validator "> GitHub</ a > < a class ="github-button " href ="https://github.com/express-validator/express-validator " data-icon ="octicon-star " data-count-href ="/express-validator/express-validator/stargazers " data-show-count ="true " data-count-aria-label ="# stargazers on GitHub " aria-label ="Star this project on GitHub "> Star</ a > </ div > </ section > < section class ="copyright "> Copyright © 2020 express-validator</ section > </ footer > </ div > </ body > </ html >
148+ < h2 > < a class ="anchor " aria-hidden ="true " id ="complex-errors "> </ a > < a href ="#complex-errors " aria-hidden ="true " class ="hash-link "> < svg class ="hash-link-icon " aria-hidden ="true " height ="16 " version ="1.1 " viewBox ="0 0 16 16 " width ="16 "> < path fill-rule ="evenodd " d ="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z "> </ path > </ svg > </ a > Complex errors</ h2 >
149+ < p > Error messages can be more complex types than a simple < code > string</ code > .< br >
150+ For example you can provide an object with multiple properties:</ p >
151+ <!-- prettier-ignore-start -->
152+ < pre > < code class ="hljs css language-js "> < span class ="hljs-comment "> // check(field, withMessage) and .withMessage() work the same</ span >
153+ check(< span class ="hljs-string "> 'email'</ span > ).isEmail().withMessage({
154+ < span class ="hljs-attr "> message</ span > : < span class ="hljs-string "> 'Not an email'</ span > ,
155+ < span class ="hljs-attr "> errorCode</ span > : < span class ="hljs-number "> 1</ span > ,
156+ })
157+ </ code > </ pre >
158+ <!-- prettier-ignore-end -->
159+ </ span > </ div > </ article > </ div > < div class ="docs-prevnext "> < a class ="docs-prev button " href ="/docs/next/custom-validators-sanitizers.html "> < span class ="arrow-prev "> ← </ span > < span > Custom validators/sanitizers</ span > </ a > < a class ="docs-next button " href ="/docs/next/wildcards.html "> < span > Wildcards</ span > < span class ="arrow-next "> →</ span > </ a > </ div > </ div > </ div > < nav class ="onPageNav "> < ul class ="toc-headings "> < li > < a href ="#error-message-levels "> Error message levels</ a > < ul class ="toc-headings "> < li > < a href ="#validator-level "> Validator Level</ a > </ li > < li > < a href ="#custom-validator-level "> Custom Validator Level</ a > </ li > < li > < a href ="#field-level "> Field Level</ a > </ li > </ ul > </ li > < li > < a href ="#dynamic-messages "> Dynamic messages</ a > </ li > < li > < a href ="#complex-errors "> Complex errors</ a > </ li > </ ul > </ nav > </ div > < footer class ="nav-footer " id ="footer "> < section class ="sitemap "> < a href ="/ " class ="nav-home "> < img src ="/img/logo.svg " alt ="express-validator " width ="66 " height ="58 "/> </ a > < div > < h5 > Docs</ h5 > < a href ="/docs/index.html "> Getting Started</ a > < a href ="/docs/check-api.html "> API Reference</ a > </ div > < div > < h5 > Community</ h5 > < a href ="http://stackoverflow.com/questions/tagged/express-validator " target ="_blank " rel ="noreferrer noopener "> Stack Overflow</ a > </ div > < div > < h5 > More</ h5 > < a href ="https://github.com/express-validator/express-validator "> GitHub</ a > < a class ="github-button " href ="https://github.com/express-validator/express-validator " data-icon ="octicon-star " data-count-href ="/express-validator/express-validator/stargazers " data-show-count ="true " data-count-aria-label ="# stargazers on GitHub " aria-label ="Star this project on GitHub "> Star</ a > </ div > </ section > < section class ="copyright "> Copyright © 2020 express-validator</ section > </ footer > </ div > </ body > </ html >
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