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When a watch is triggered, its condition determines whether or not to execute the watch actions. Watcher supports the following condition types:
always: set the watch condition to
trueso the watch actions are always executed.
never: set the watch condition to
falseso the watch actions are never executed.
compare: perform simple comparisons against values in the watch payload to determine whether or not to execute the watch actions.
array_compare: compare an array of values in the watch payload to a given value to determine whether or not to execute the watch actions.
script: use a script to determine wehther or not to execute the watch actions.
If you omit the condition definition from a watch, the condition defaults
When a condition is evaluated, it has full access to the watch execution context,
including the watch payload (
ctx.payload.*). The script,
compare and array_compare
conditions can use the payload data to determine whether or not the necessary
conditions are met.