How do you start the web server?
Who is printing the error?
There are functions available in clojure.main to replicate the message from
the repl - you can call them yourself.
See https://clojure.org/reference/repl_and_main#_error_printing for more on
error triage and the functions like Throwable>map, clojure.main/ex-triage,
and clojure.main/ex-str. This chain of functions is what the REPL uses to
produce the message below
On Friday, June 7, 2019 at 8:28:56 AM UTC-5, Sven Richter wrote:
>
> Hi,
>
> I just recently found out that the spec error reporting is different in
> different environments.
> I have the following functions:
>
>
> (defn search-page [{:keys [off-url off-user off-password]} search]
> (let [products (off/search-products search)
> products-with-nutriments (mapv #(off/add-nutriments %
> off/nutriments-to-extract) (:products products))]
> (layout/render "off/search.html" {:products products-with-nutriments
> :search search})))
>
>
> (defn off-routes [config]
> (routes (GET "/off/search" [] (search-page config "toast"))))
>
> where off/add-nutriments is a specced function. Now when the spec of that
> function fails and I call *search-page* from the REPL I get this output:
>
> Execution error - invalid arguments to off/add-nutriments at (core.clj:9).
> "" - failed: #{"kJ" "kcal" "kCal" "g" "mg"} at: [:product :nutriments
> :clojure.spec.alpha/pred :sugars_unit] spec: :off/unit
> "" - failed: #{"kJ" "kcal" "kCal" "g" "mg"} at: [:product :nutriments
> :clojure.spec.alpha/pred :fat_unit] spec: :off/unit
> "" - failed: #{"kJ" "kcal" "kCal" "g" "mg"} at: [:product :nutriments
> :clojure.spec.alpha/pred :salt_unit] spec: :off/unit
> {:salt "3.5", :sugars_unit "", :energy-kcal "201.81514210652017",
> :energy_unit "kcal", :energy_value 202, :proteins_value "17.6",
> :proteins_unit "", :carbohydrates_unit "", :saturated-fat_value "8.2", :fat
> 12, :energy 845, :salt_value "3.5", :saturated-fat_unit "", :fat_100g 12,
> :sugars_value 6, :sodium_100g "1.37795275590551", :carbohydrates_value 6,
> :proteins_100g "17.6", :fat_unit "", :saturated-fat "8.2", :sugars_100g 6,
> :sodium "1.37795275590551", :sugars 6, :carbohydrates 6, :energy_100g 845,
> :salt_100g "3.5", :saturated-fat_100g "8.2", :salt_unit "",
> :carbohydrates_100g 6, :proteins "17.6", :fat_value 12} - failed: nil? at:
> [:product :nutriments :clojure.spec.alpha/nil] spec: :off/nutriments
>
> which is nice and readable.
>
> Whereas when I run the *search-page* from the started web server through the
> */off/search* route I get a stacktrace and a very unreadable output:
>
> clojure.lang.ExceptionInfo: Call to
> #'de.sveri.getless.service.off/add-nutriments did not conform to spec.
> {:clojure.spec.alpha/problems ({:path [:product :nutriments
> :clojure.spec.alpha/nil], :pred nil?, :val {:salt "3.5", :sugars_unit "",
> :energy-kcal "201.81514210652017", :energy_unit "kcal", :energy_value 202,
> :proteins_value "17.6", :proteins_unit "", :carbohydrates_unit "",
> :saturated-fat_value "8.2", :fat 12, :energy 845, :salt_value "3.5",
> :saturated-fat_unit "", :fat_100g 12, :sugars_value 6, :sodium_100g
> "1.37795275590551", :carbohydrates_value 6, :proteins_100g "17.6", :fat_unit
> "", :saturated-fat "8.2", :sugars_100g 6, :sodium "1.37795275590551", :sugars
> 6, :carbohydrates 6, :energy_100g 845, :salt_100g "3.5", :saturated-fat_100g
> "8.2", :salt_unit "", :carbohydrates_100g 6, :proteins "17.6", :fat_value
> 12}, :via [:de.sveri.getless.service.off/nutriments], :in [0 :nutriments]}
> {:path [:product :nutriments :clojure.spec.alpha/pred :sugars_unit], :pred
> #{"kJ" "kcal" "kCal" "g" "mg"}, :val "", :via
> [:de.sveri.getless.service.off/nutriments
> :de.sveri.getless.service.off/unit], :in [0 :nutriments :sugars_unit]} {:path
> [:product :nutriments :clojure.spec.alpha/pred :fat_unit], :pred #{"kJ"
> "kcal" "kCal" "g" "mg"}, :val "", :via
> [:de.sveri.getless.service.off/nutriments
> :de.sveri.getless.service.off/unit], :in [0 :nutriments :fat_unit]} {:path
> [:product :nutriments :clojure.spec.alpha/pred :salt_unit], :pred #{"kJ"
> "kcal" "kCal" "g" "mg"}, :val "", :via
> [:de.sveri.getless.service.off/nutriments
> :de.sveri.getless.service.off/unit], :in [0 :nutriments :salt_unit]}),
> :clojure.spec.alpha/spec
> #object[clojure.spec.alpha$regex_spec_impl$reify__2509 0x302765e4
> "clojure.spec.alpha$regex_spec_impl$reify__2509@302765e4"],
> :clojure.spec.alpha/value ({:image_thumb_url
> "https://static.openfoodfacts.org/images/products/20987664/front_de.3.100.jpg";,
> :_keywords ["schmelzkase" "light" "toast"], :image_small_url
> "https://static.openfoodfacts.org/images/products/20987664/front_de.3.200.jpg";,
> :nutriments {:salt "3.5", :sugars_unit "", :energy-kcal
> "201.81514210652017", :energy_unit "kcal", :energy_value 202, :proteins_value
> "17.6", :proteins_unit "", :carbohydrates_unit "", :saturated-fat_value
> "8.2", :fat 12, :energy 845, :salt_value "3.5", :saturated-fat_unit "",
> :fat_100g 12, :sugars_value 6, :sodium_100g "1.37795275590551",
> :carbohydrates_value 6, :proteins_100g "17.6", :fat_unit "", :saturated-fat
> "8.2", :sugars_100g 6, :sodium "1.37795275590551", :sugars 6, :carbohydrates
> 6, :energy_100g 845, :salt_100g "3.5", :saturated-fat_100g "8.2", :salt_unit
> "", :carbohydrates_100g 6, :proteins "17.6", :fat_value 12},
> :ingredients_text "", :rev 10, :lang "de", :ingredients [], :id "20987664",
> :code "20987664", :product_name_de "Toast Light Schmelzkäse",
> :nutrition_data_per "100g", :quantity "250 g", :product_name "Toast Light
> Schmelzkäse"} #object[clojure.core$partial$fn__5841 0x73f4c45a
> "clojure.core$partial$fn__5841@73f4c45a"] ["energy" "fat" "saturated-fat"
> "carbohydrates" "sugars" "proteins" "salt" "fiber" "cholesterol"
> "monounsaturated-fat" "polyunsaturated-fat"]), :clojure.spec.alpha/fn
> de.sveri.getless.service.off/add-nutriments, :clojure.spec.alpha/args
> ({:image_thumb_url
> "https://static.openfoodfacts.org/images/products/20987664/front_de.3.100.jpg";,
> :_keywords ["schmelzkase" "light" "toast"], :image_small_url
> "https://static.openfoodfacts.org/images/products/20987664/front_de.3.200.jpg";,
> :nutriments {:salt "3.5", :sugars_unit "", :energy-kcal
> "201.81514210652017", :energy_unit "kcal", :energy_value 202, :proteins_value
> "17.6", :proteins_unit "", :carbohydrates_unit "", :saturated-fat_value
> "8.2", :fat 12, :energy 845, :salt_value "3.5", :saturated-fat_unit "",
> :fat_100g 12, :sugars_value 6, :sodium_100g "1.37795275590551",
> :carbohydrates_value 6, :proteins_100g "17.6", :fat_unit "", :saturated-fat
> "8.2", :sugars_100g 6, :sodium "1.37795275590551", :sugars 6, :carbohydrates
> 6, :energy_100g 845, :salt_100g "3.5", :saturated-fat_100g "8.2", :salt_unit
> "", :carbohydrates_100g 6, :proteins "17.6", :fat_value 12},
> :ingredients_text "", :rev 10, :lang "de", :ingredients [], :id "20987664",
> :code "20987664", :product_name_de "Toast Light Schmelzkäse",
> :nutrition_data_per "100g", :quantity "250 g", :product_name "Toast Light
> Schmelzkäse"} #object[clojure.core$partial$fn__5841 0x73f4c45a
> "clojure.core$partial$fn__5841@73f4c45a"] ["energy" "fat" "saturated-fat"
> "carbohydrates" "sugars" "proteins" "salt" "fiber" "cholesterol"
> "monounsaturated-fat" "polyunsaturated-fat"]), :clojure.spec.alpha/failure
> :instrument, :clojure.spec.test.alpha/caller {:file "off.clj", :line 15,
> :var-scope de.sveri.getless.routes.off/search-page, :local-fn fn}}
> at
> clojure.spec.test.alpha$spec_checking_fn$conform_BANG___3024.invoke(alpha.clj:132)
> at
> clojure.spec.test.alpha$spec_checking_fn$fn__3026.doInvoke(alpha.clj:140)
> at clojure.lang.RestFn.invoke(RestFn.java:421)
> at de.sveri.getless.routes.off$search_page$fn__32398.invoke(off.clj:15)
> at clojure.core$mapv$fn__8445.invoke(core.clj:6912)
> ...
>
> Obviously I would prefer the stacktrace and the readable output, but have no
> idea how to achieve that. What is the idiomatic way to print a readable spec
> explanation and a stacktrace in this context?
>
> Thanks,
> Sven
>
>
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![https://static.openfoodfacts.org/images/products/20987664/front_de.3.100.jpg"](https://static.openfoodfacts.org/images/products/20987664/front_de.3.100.jpg"){kind=link}
![https://static.openfoodfacts.org/images/products/20987664/front_de.3.200.jpg"](https://static.openfoodfacts.org/images/products/20987664/front_de.3.200.jpg"){kind=link}