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filter expression - NOT operator

  • January 10, 2019
  • 0 replies
  • 214 views

How do you express the NOT operator within a filter?


For example, find all tickets where a custom field is not null?


I have tried the following formats


?query="field!null"

?query="field%20NOT%20null"

?query="field!:null"

?query="field:!null"


All these formats fail

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