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dynamic Express {} | |
Application requireExpressAndCallConstructor() { | |
dynamic { return require("express")(); } | |
} | |
dynamic Request {} | |
dynamic Response { | |
shared formal void send(String string); | |
} | |
dynamic Application { | |
shared formal void get(String path, | |
Anything(Request, Response)|Null|Anything(Request, Response)[] callbacks=null); | |
shared formal Server listen(Integer integer, Anything() callable); | |
} |
dynamic Path { | |
} | |
dynamic Server { | |
shared formal dynamic address(); | |
} |
"Run the module `my.express`." | |
shared void run() { | |
Application app = requireExpressAndCallConstructor(); | |
app.get("/", (Request req, Response res) { | |
return res.send("Hello world!"); | |
}); | |
Server server = app.listen(3000, () { | |
//dynamic host = server.address().address; | |
//dynamic port = server.address().port; | |
dynamic { | |
console.log( | |
"Example app listening..."// at http://%s:%s", | |
//host, | |
//port | |
); | |
} | |
return nothing; | |
}); | |
} |
Yeah I was trying to get around the fact that in JavaScript you call the express constructor with 'express()' and I couldn't figure out how to get that to work in Ceylon because it seems like the compiler is looking for some function that I'm referencing there. I'm away from my computer but will requireExpress.express()
run Express' constructor?
The createApplication
function was what I thought Express was calling when it constructed but Express gave me an error when I tried to call it so I was just using the name to encapsulate the dynamic return of the constructor and also as a place to add the Application type to what the constructor returns.
I've updated the code per your suggestions @chochos and I am now getting a new error that I don't understand 😕
if(type.t.$$.T$name in obj.getT$all()){
^
TypeError: Cannot use 'in' operator to search for 'my.express::Application' in undefined
at is$ (C:\Users\madca_000\.eclipse\org.eclipse.platform_4.4.1_1167611518_win32_win32_x86_64\plugins\com.redhat.ceylon.dist.repo_1.1.0.v20141013-1416\repo\ceylon\language\1.1.0\ceylon.language-1.1.0.js:188:28)
at Object.dre$$ (C:\Users\madca_000\.eclipse\org.eclipse.platform_4.4.1_1167611518_win32_win32_x86_64\plugins\com.redhat.ceylon.dist.repo_1.1.0.v20141013-1416\repo\ceylon\language\1.1.0\ceylon.language-1.1.0.js:634:5)
at requireExpressAndCallConstructor (C:\Users\madca_000\eclipse\ceylon-express-raw\modules\my\express\1.0.0\my.express-1.0.0.js:76:17)
at run (C:\Users\madca_000\eclipse\ceylon-express-raw\modules\my\express\1.0.0\my.express-1.0.0.js:13:13)
at [eval]:1:292
at Object.<anonymous> ([eval]-wrapper:6:22)
at Module._compile (module.js:456:26)
at evalScript (node.js:536:25)
at startup (node.js:80:7)
at node.js:906:3
I know it has to do with calling the return of require
(i.e., require("express")();
) but that is how the JavaScript is done. Here is the example given in the Express.js docs:
var express = require('express')
var app = express()
app.get('/', function (req, res) {
...
})
var server = app.listen(3000, function () {
...
})
And when I don't call the return (i.e., require("express");
), I get this:
$3i.$_get("/",m$3h.$JsCallable((function($3j,$3k){
^
TypeError: Object function createApplication() {
var app = function(req, res, next) {
app.handle(req, res, next);
};
mixin(app, proto);
mixin(app, EventEmitter.prototype);
app.request = { __proto__: req, app: app };
app.response = { __proto__: res, app: app };
app.init();
return app;
} has no method '$_get'
at run (C:\Users\madca_000\eclipse\ceylon-express-raw\modules\my\express\1.0.0\my.express-1.0.0.js:14:9)
at [eval]:1:292
at Object.<anonymous> ([eval]-wrapper:6:22)
at Module._compile (module.js:456:26)
at evalScript (node.js:536:25)
at startup (node.js:80:7)
at node.js:906:3
I think the problem is with
return express()
, not withrequire('express')
. node.js throws when it can't find a module, and the message isCannot find module 'blah'
; your message is different. There's noexpress
function defined anywhere in your code. If theexpress
module contains it, you'd need to call it asrequireExpress().express()
.I also see a
createApplication
defined inside theExpress
dynamic interface. I haven't usedexpress
so I don't know ifcreateApplication
is really a function inside that module, but I see you define your own toplevel method with the same name.