Latest Contributions by Matt-Goodman

A known deficiency with the current version of Survey123 Connect is that it does not evaluate constraints until form submission. Many users have the need or desire to have their surveys evaluate a regular expression constraint before proceeding to the next question or next page in their form (more on the problem here). Below is a possible (although somewhat clunky) work-around. It uses 'note' type rows so that no new fields are required in the data schema.  Identify the data field row that you want to validate with regex and insert two new rows below it. Set both new row types to 'note'. For the first note, make its 'appearance' hidden and write an 'if' expression in the 'calculation' column that evaluates your regex expression, returning some simple Boolean-like values like OK/bad, True/False, Yes/No, etc. Example:  if(regex(${field2check}, '^[a-zA-Z]'), "OK", "bad") For the second note row, leave its 'appearance' visible, but set its 'relevant' column to ${field2check}!="" and ${calc_row}!="OK" (this means that this note will not be visible unless the field that you're trying to validate is not blank and it has been evaluated as not "OK" by the calculation done in the row above. Set the text ('label') for this row to whatever you want your error message to be.  Here is a simplified example: type name label appearance required required_message calculation constraint constraint_message::default constraint_message relevant begin group user_info User Info field-list               text name Name   yes Enter a valid name to proceed           note namecheck namecheck hidden     if(regex(${name}, '^[a-zA-Z]'), "OK", "")         note nameerrornote Enter a valid name to proceed               ${name}!="" and ${namecheck}!="OK" range age Age   yes           ${namecheck}="OK" text additionalnotes Additional Notes               ${age}!="" end group                     There may be more elegant workarounds, so if you're aware of ways to make this more slick, please comment.  ... View more

Hi,  I can't decipher from any documentation how I'm supposed to build an expression to automatically calculate a value based on a previous question, specifically using the "String" option. Is this window expecting Arcade? When I write a basic expression, it get a syntax error.  Arcade expression syntax error   I am hoping to use this function to parse off just the address number (1234) from the full address (1234 Maple Lane) in a previous question.  ... View more

Very often I want some of my layer groups to only display one of its layers at a time. For example, a group of aerial imagery coverages from different years. I rarely (never?) want two different years to draw at the same time because one will draw over the other. It would be a really handy efficiency improvement if I could go into the group properties and check a box that makes the group a "toggle group" which would only allow one single layer to be checked on at any given time, automatically un-checking other layers in the group. I believe this would save time and image rendering resources, especially for workflows that require frequent comparison of different high-resolution imagery. But it could also be useful for comparing layers depicting different vintages of property ownership, jurisdictional boundaries, etc.  ... View more