流星：如何使用來自模板中的Http調用的數據

Question

我在Http main.js中進行調用，並將此返回給我的控制檯「Uncaught TypeError：無法讀取null的屬性'set' 無法從中檢索信息我的http調用在函數本身之外。 感謝您的幫助。

Template.prod.onCreated(function prodOnCreated() { 
var tmpl = this; 
tmpl.data = new ReactiveVar; 

HTTP.call('GET', 'https://localhost:9002/rest/v2/electronics/products/search/?query=:price-asc:category:575', {}, function(error, response) { 
if (error) 
console.log(error); 
else { 
console.log(response.data.products[0].code); // that works: display "2140285" 
tmpl.data.set(response.data);// Doesn't work: message in the console "Uncaught TypeError: Cannot read property 'set' of null" 
} 
}); 
}); 


Template.prod.helpers({ 
data: function() { 
console.log('Hi you are in the data function'); 
return Template.instance().data.get(); 
} 
}); 

控制檯顯示：

main.js:40 Uncaught TypeError: Cannot read property 'set' of null(anonymous function) @ main.js:40(anonymous function) @ httpcall_client.js:83(anonymous function) @ underscore.js?hash=8de51f9…:784xhr.onreadystatechange @ httpcall_client.js:172

Answer 1

首先，您需要使用添加包下面

meteor add reactive-var 

，那麼你可以初始化reactivevar像

tmpl.data = new ReactiveVar();