vue 往json里添加数据的方式

Object.assign(
          this.saveData,
          { poNo: this.poNo },
          { age: 17 },
          { name: 'Remilia' }
        )
        
let date = {
        ...this.$refs.addAndEdit.formModel,
        userId: this.$store.getters.userInfo.userId,
      }