尝试这个Om＆amp;反应教程https://www.codementor.io/reactjs/tutorial/build-single-page-app-with-react-om-clojurescript。编译clojurescript时，我收到错误clojure.lang.ExceptionInfo: Don't know how to create ISeq from: clojure.lang.Symbol at line 1 {:tag :cljs/analysis-error, :file nil, :line 1, :column 1}。
显然原因在于om-tools.dom。有人可以解释我做错了吗？
core.cljs：
(ns spa-tutorial.core
(:require [om.core :as om :include-macros true]
[om-tools.dom :as dom :include-macros true]
[om-tools.core :refer-macros [defcomponent]]
[secretary.core :as sec :include-macros true]
[goog.events :as events]
[goog.history.EventType :as EventType]))
(enable-console-print!)
(def app-state (atom {:text "Hello world!"}))
(om/root
(fn [app owner]
(reify om/IRender
(render [_]
(dom/h1 nil (:text app)))))
app-state
{:target (. js/document (getElementById "app"))})
project.clj：
(defproject spa-tutorial "0.1.0-SNAPSHOT"
:description "FIXME: write this!"
:url "http://example.com/FIXME"
:dependencies [[org.clojure/clojure "1.6.0"]
[org.clojure/clojurescript "0.0-2755"]
[org.clojure/core.async "0.1.346.0-17112a-alpha"]
[org.omcljs/om "0.8.8"]
[prismatic/om-tools "0.4.0"]
[http-kit "2.1.19"]
[secretary "1.2.3"]]
:plugins [[lein-cljsbuild "1.0.5"]]
:source-paths ["src" "target/classes"]
:clean-targets ["out/spa_tutorial" "out/spa_tutorial.js"]
:cljsbuild {
:builds [{:id "spa-tutorial"
:source-paths ["src"]
:compiler {
:main spa-tutorial.core
:output-to "out/spa_tutorial.js"
:output-dir "out"
:optimizations :none
:verbose true}}]})
堆栈跟踪：
clojure.lang.ExceptionInfo: failed compiling file:out/om_tools/dom.cljs {:file #<File out/om_tools/dom.cljs>}
at clojure.core$ex_info.invoke(core.clj:4403)
at cljs.compiler$compile_file.invoke(compiler.clj:1050)
at cljs.closure$compile_file.invoke(closure.clj:343)
at cljs.closure$eval3178$fn__3179.invoke(closure.clj:394)
at cljs.closure$eval3114$fn__3115$G__3105__3122.invoke(closure.clj:301)
at cljs.closure$compile_from_jar.invoke(closure.clj:386)
at cljs.closure$eval3173$fn__3174.invoke(closure.clj:400)
at cljs.closure$eval3114$fn__3115$G__3105__3122.invoke(closure.clj:301)
at cljs.closure$get_compiled_cljs.invoke(closure.clj:463)
at cljs.closure$cljs_dependencies.invoke(closure.clj:507)
at cljs.closure$add_dependencies.doInvoke(closure.clj:529)
at clojure.lang.RestFn.applyTo(RestFn.java:139)
at clojure.core$apply.invoke(core.clj:626)
at cljs.closure$build.invoke(closure.clj:1081)
at cljs.closure$build.invoke(closure.clj:1020)
at cljsbuild.compiler$compile_cljs$fn__3416.invoke(compiler.clj:81)
at cljsbuild.compiler$compile_cljs.invoke(compiler.clj:80)
at cljsbuild.compiler$run_compiler.invoke(compiler.clj:180)
at user$eval3548$iter__3584__3588$fn__3589$fn__3607.invoke(form-init1935966926108010861.clj:1)
at user$eval3548$iter__3584__3588$fn__3589.invoke(form-init1935966926108010861.clj:1)
at clojure.lang.LazySeq.sval(LazySeq.java:40)
at clojure.lang.LazySeq.seq(LazySeq.java:49)
at clojure.lang.RT.seq(RT.java:484)
at clojure.core$seq.invoke(core.clj:133)
at clojure.core$dorun.invoke(core.clj:2855)
at clojure.core$doall.invoke(core.clj:2871)
at user$eval3548.invoke(form-init1935966926108010861.clj:1)
at clojure.lang.Compiler.eval(Compiler.java:6703)
at clojure.lang.Compiler.eval(Compiler.java:6693)
at clojure.lang.Compiler.load(Compiler.java:7130)
at clojure.lang.Compiler.loadFile(Compiler.java:7086)
at clojure.main$load_script.invoke(main.clj:274)
at clojure.main$init_opt.invoke(main.clj:279)
at clojure.main$initialize.invoke(main.clj:307)
at clojure.main$null_opt.invoke(main.clj:342)
at clojure.main$main.doInvoke(main.clj:420)
at clojure.lang.RestFn.invoke(RestFn.java:421)
at clojure.lang.Var.invoke(Var.java:383)
at clojure.lang.AFn.applyToHelper(AFn.java:156)
at clojure.lang.Var.applyTo(Var.java:700)
at clojure.main.main(main.java:37)
Caused by: clojure.lang.ExceptionInfo: Don't know how to create ISeq
from: clojure.lang.Symbol at line 1 {:tag :cljs/analysis-error, :file
nil, :line 1, :column 1}
at clojure.core$ex_info.invoke(core.clj:4403)
at cljs.analyzer$error.invoke(analyzer.clj:299)
at cljs.analyzer$analyze_seq.invoke(analyzer.clj:1634)
at cljs.analyzer$analyze$fn__1802.invoke(analyzer.clj:1723)
at cljs.analyzer$analyze.invoke(analyzer.clj:1716)
at cljs.analyzer$parse_ns$fn__1819$fn__1824.invoke(analyzer.clj:1801)
at cljs.analyzer$parse_ns$fn__1819.invoke(analyzer.clj:1801)
at cljs.analyzer$parse_ns.invoke(analyzer.clj:1789)
at cljs.compiler$compile_file.invoke(compiler.clj:1032)
... 39 more
Caused by: java.lang.IllegalArgumentException: Don't know how to create
ISeq from: clojure.lang.Symbol
答案 0 :(得分：0)
Clojure错误消息（没有clojure.spec）是获得的品味。消息Don't know how to create ISeq from: clojure.lang.Symbol表示ClojureScript期望一个序列（ISeq接口），但它获得symbol。
这是因为:refer-macros true的语法对编译器无效。您正在使用较新版本的Clojure来编译旧教程。
现在ClojureScript需要一系列导入的宏（例如:refer-macros [first-macro second-macro]），而不是布尔符号（例如:refer-macros true）。虽然后者syntax was valid在旧版本的ClojureScript中。
当您将依赖项更新为较新版本并删除代码编译的:refer-macro时。即，
project.clj：
(defproject spa-tutorial "0.1.0-SNAPSHOT"
:description "FIXME: write this!"
:url "http://example.com/FIXME"
:dependencies [[org.clojure/clojure "1.8.0"]
[org.clojure/clojurescript "1.9.473"]
[org.clojure/core.async "0.3.443"]
[org.omcljs/om "1.0.0-beta1"]
[prismatic/om-tools "0.4.0"]]
:plugins [[lein-cljsbuild "1.1.6"]]
:source-paths ["src" "target/classes"]
:clean-targets ["out/spa_tutorial" "out/spa_tutorial.js"]
:cljsbuild {:builds [{:id "spa-tutorial"
:source-paths ["src"]
:compiler {:main spa-tutorial.core
:output-to "out/spa_tutorial.js"
:output-dir "out"
:optimizations :none
:verbose true}}]})
core.cljs：
(ns spa-tutorial.core
(:require [om.core :as om]
[om-tools.dom :as dom]
[om-tools.core :refer-macros [defcomponent]]
[goog.events :as events]
[goog.history.EventType :as EventType]))
(enable-console-print!)
(def app-state (atom {:text "Hello world!"}))
(om/root
(fn [app owner]
(reify om/IRender
(render [_]
(dom/h1 nil (:text app)))))
app-state
{:target (. js/document (getElementById "app"))})
我建议切换到一个新的教程，该教程也使用Figwheel（一个很棒的库，可以在浏览器中重新加载热代码）。例如Basic Tutorial of the Om wiki。