2.2 KiB
Question
How can I inspect the contents of app-db? Perhaps from figwheel.
Short Answer
If at a REPL, inspect: re-frame.db/app-db.
If at the js console, that's window.re_frame.db.app_db.state.
You are using cljs-devtools, right? If not, stop everything and immediately make that happen.
Better Answer
Are you sure you need to?
First, you seldom want to inspect all of app-db.
And, second, inspecting via a REPL might be clumsy.
Instead, you probably want to inspect a part of app-db. And you probably want
to inspect it directly in the GUI itself, not off in a REPL.
Here is a useful technique from @escherize. Add something like this to the hiccup of your view ...
[:pre (with-out-str (pprint @interesting))]
This assumes that @interesting is the value (ratom or subscription)
you want to observe (note the @ in front).
pprint output is nice to read, but not compact. For a more compact view, do this:
[:pre (pr-str @some-atom)] ;; NB: using pr-str instead of pprint
If you choose to use pprint then you'll need to require it within the ns of your view.cljs:
[cljs.pprint :refer [pprint]]
Finally, combining the short and long answers, you could even do this:
[:pre (with-out-str (pprint @re-frame.db/app-db))] ;; see everything!
or
[:pre (with-out-str (pprint (:part @re-frame.db/app-db)))] ;; see a part of it!
You definitely have clj-devtools installed now, right?
Other Inspection Tools
Another very strong tool is re-Frisk which provides a nice solution for navigating and inspecting your re-frame data structures.
@yogthos' json-html library provides a slick presentation, at the expense of more screen real estate, and the need to include specific CSS.
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