[英]node.js object extended with a mixin can't find function after instantiation
我已經為我的mixins獲得了一個相當復雜的設置(盡管這是代碼審查的問題),如下所示:
TooManyCaps.js
module.exports = {
labelCopyCaps: () => {
if (this.release.tracks.length > 1) {
if (_this._notEnoughLowercase(this.release.title)) {
this._recordError(release, 'LABELCOPYCAPS');
} else {
this.release.tracks.some( (track) => {
if (this._lowerCaseCount(track.label_copy)) {
this._recordError(release, 'LABELCOPYCAPS');
return true;
}
});
}
}
},
_notEnoughLowercase: (str) => {
if ((str.match(/[a-zA-Z]/g)||[]).length > 3
&& str.length - str.replace(/[a-z]/g, '').length) {
return true;
}
return false;
}
};
然后,我有一個將其用作混合的對象:
Rule.js
class Rule {
constructor(release) {
this.release = release;
this.errors = [];
}
_recordError(error, options) {
this.errors.push({
release_id: this.release.id,
rule: error,
options: options,
});
}
}
module.exports = Rule;
然后我有一個索引頁面,將它們連接在一起
index.js
const TooManyCaps = require('./TooManyCaps');
const Rule = require('./Rule');
Object.assign(Rule.prototype, [TooManyCaps]);
module.exports = Rule;
然后,我的程序的主要開始是進行一些實例化:
'use strict';
const RuleValidator = require('./job/validation/RuleValidatorMixin');
const Rule = require('./job/validation/rulesmixins/rules/index');
// some logic that's a loop
arr.forEach((value) => {
new RuleValidator(new Rule(value)).validate();
}
在validate()中,我有:
validate() {
console.log('VALIDATE');
this.rule.labelCopyCaps();
// console.log(this.rule);
}
但是當我運行它時,我得到:
this.rule.labelCopyCaps is not a function
那我哪里出問題了?
Object.assign
不采用數組:
Object.assign(Rule.prototype, [TooManyCaps]); // ^ ^
應該只是
Object.assign(Rule.prototype, TooManyCaps);
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