将数据从Props传递到vue.js中的数据 [英] Passing data from Props to data in vue.js

问题描述

我有以下vue组件：

<template>
  <div class ="container bordered">
    <div class="row">
      <div class="col-md-12">
  <CommitChart :data="chartOptions"></Commitchart>
  </div>
</div>
</div>
</template>
<script>
import CommitChart from './CommitChart';

export default {
  data() {
    return {
      chartOptions: {
        labels:  ['pizza', 'lasagne', 'Cheese'],
        datasets: [{
          label: '# of Votes',
          data: [12, 19, 3],
          backgroundColor: [
                'rgba(10, 158, 193, 1)',
                'rgba(116, 139, 153, 1)',
                'rgba(43, 94, 162, 1)',

            ],
            borderColor: [
              'rgba(44, 64, 76, 1)',
              'rgba(44, 64, 76, 1)',
              'rgba(44, 64, 76, 1)',

            ],
            borderWidth: 3
        }],
    },
    };
  },
  components: { CommitChart },
};
</script>
<style scoped>
</style>

如您所见，此组件实际上是另一个组件commitChart的包装器。提交图表采用chartOptions的json对象。我不希望其他组件更改除标签和数据之外的任何内容，因此我希望将标签和数据作为道具传递并在数据中使用它们。

as you can see, this component is effectively a wrapper for another component which is commitChart. Commit chart takes a json object of chartOptions. I don't want the other components to change anything but the labels and data, so I therefore would like to pass label and data as props and use these in data.

我尝试将这些作为道具添加到此组件，然后在数据中，分配它们，如下所示：

i tried adding these as props to this component and then in data, assigning them, something like this:

    props: 
['label']

然后在数据中：

label: labels

然而这并不是'工作

我有什么建议可以达到这个目的吗？

Any suggestions how i may achieve this?

推荐答案

听起来您只想修改 chartOptions 对象中的一些选项，并将它们传递给 CommitChart 组件。

It sounds like you want to modify just a few of the options in your chartOptions object and pass them as to your CommitChart component.

export default {
  props:["label","data"],
  data() {
    return {
      chartOptions: {...},
    }
  },
  computed:{
    commitChartOptions(){
      let localOptions = Object.assign({}, this.chartOptions)
      localOptions.datasets[0].label = this.label;
      localOptions.datasets[0].data = this.data;
      return localOptions;
    }
  }
}

然后在你的模板中，使用 commitChartOptions 计算。

And then in your template, use the commitChartOptions computed.

<CommitChart :data="commitChartOptions"></Commitchart>

这是示例展示了这个概念。

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