我的MEEN堆栈应用程序上有一个模块记录错误。我有一个我的ember路由的模型,它通过mongoose从我的快速服务器中提取数据。
我想更改模型上的日期属性,以便将日期格式设置为与存储在mongo数据库中的方式不同,以节省页面上的一些空间,即:Tue Sep 19 2017 16:57:17 GMT-0400( (美国东部时间)至2017-09-19。
我在模型上遵循了Ember文档的计算机属性,但模板没有显示计算值。
模型:
import DS from 'ember-data';
import Ember from 'Ember';
export default DS.Model.extend({
error: DS.attr('string'),
user: DS.attr('string'),
module: DS.attr('string'),
date: DS.attr('string'),
smallDate: Ember.computed('date', function() {
var dateObj = new Date(this.get('date'));
return `${dateObj.getFullYear()}-${dateObj.getMonth()}-${dateObj.getDate()}`;
})
});
模板:
<div class="row">
<div class="col-md-8 col-md-offset-2 text-center">
<h2 class="toolTitle">Blame Panel</h2>
</div>
</div>
<div class="col-md-8 col-md-offset-2">
<table class="table">
<thead>
<tr>
<th>#</th>
<th>User</th>
<th>Error</th>
<th>Component</th>
<th>Date</th>
</tr>
</thead>
<tbody>
{{#each model as |blame index|}}
<tr>
<th scope="row">{{index}}</th>
<td>{{blame.user}}</td>
<td>{{blame.error}}</td>
<td>{{blame.module}}</td>
<td>{{blame.smallDate}}</td>
</tr>
{{/each}}
</tbody>
</table>
</div>
如果我只使用模型的日期属性,则会显示未格式化的日期。
答案 0 :(得分:1)
看起来应该有效。你看到了什么行为呢?
可能更适合您的设置的另一个选项是将格式问题转移到帮助程序中。如果您执行library(quantmod)
options("getSymbols.warning4.0" = FALSE,
"getSymbols.auto.assign" = FALSE)
SPY <- getSymbols(c("SPY"), from = "2016-09-01")
SPY <- as.numeric(SPY$SPY.Close)
set.seed(123)
#create a time index
t <- 1:(length(SPY)-1)
#tradable capital vector
Vt <- c(rep(10000, length(t)))
#Benchmark return series
Rb <- rep(NA, length(t))
for(i in 2:length(t)) {
Rb[i] <- (SPY[i] / SPY[i - 1]) - 1
}
#Benchmark equity curve
Eb <- rep(NA, length(t))
Eb[1] <- Vt[1]
for(i in 2:length(t)) {
Eb[i] <- Eb[i - 1] * (1 + Rb[i])
}
#Randomy simulated return series 1
Rt <- rep(NA, length(t))
for(i in 2:length(t)) {
Rt[i] <- Rb[i] + rnorm(n = 1,
mean = 0.24/length(t),
sd = 2.5 * sd(Rb, na.rm = TRUE))
}
#Randomly simulated return series 2
Rt2 <- rep(NA, length(t))
for(i in 2:length(t)) {
Rt2[i] <- Rb[i] + rnorm(n = 1,
mean = 0.02/length(t),
sd = 0.75 * sd(Rb, na.rm = TRUE))
}
# Randomly Simulated Equity Curve 1
Et <- rep(NA, length(t))
Et <- Vt[1]
for(i in 2:length(t)) {
Et[i] <- Et[i-1] * (1 + Rt[i])
}
# Randomly Simulated Equity Curve 2
Et2 <- rep(NA, length(t))
Et2 <- Vt[1]
for(i in 2:length(t)) {
Et2[i] <- Et2[i-1] * (1 + Rt2[i])
}
#Plot of Et1 against the SPY Portfolio
plot(y = Et, x = t, type = "l", col = 1,
xlab = "Time", ylab= "Equity ($)",
main = "Figure 1-3: Randomly Generated Equity Curves")
grid()
abline(h = 10000)
lines(y = Et2, x = t, col = 2)
lines(y = Eb, x = t, col = 8)
legend(x = "topleft", col = c(1,2,8), lwd = 2, legend = c("Curve 1",
"Curve 2",
"SPY"))
,那么您可以使用相同的方法在以下各种地方格式化日期:
ember g helper format-date