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&lt;div&gt;&nbsp;&nbsp;I&nbsp;have&nbsp;a&nbsp;case&nbsp;where&nbsp;I&nbsp;am&nbsp;creating&nbsp;a&nbsp;resource&nbsp;through&nbsp;a&nbsp;POST.&nbsp;There&nbsp;are&nbsp;a&nbsp;number&nbsp;of&nbsp;places&nbsp;where&nbsp;the&nbsp;create&nbsp;can&nbsp;fail&nbsp;in&nbsp;a&nbsp;known&nbsp;manner,&nbsp;and&nbsp;we&nbsp;need&nbsp;to&nbsp;alert&nbsp;the&nbsp;user&nbsp;to&nbsp;the&nbsp;specifics&nbsp;of&nbsp;why.&nbsp;Is&nbsp;there&nbsp;a&nbsp;way&nbsp;to&nbsp;throw&nbsp;an&nbsp;arbitrary&nbsp;500,&nbsp;with&nbsp;message,&nbsp;from<br>
&nbsp;within&nbsp;the&nbsp;REST&nbsp;handler?&nbsp;I&nbsp;can&nbsp;obviously&nbsp;just&nbsp;erlang:error(whatever),&nbsp;but&nbsp;the&nbsp;message&nbsp;content&nbsp;is&nbsp;ignored,&nbsp;and&nbsp;there&nbsp;is&nbsp;no&nbsp;way&nbsp;to&nbsp;pass&nbsp;back&nbsp;an&nbsp;updated&nbsp;response&nbsp;when&nbsp;doing&nbsp;that.&lt;/div&gt;<br>
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