vuex mapMutations报错vuexError in v-on handler: “TypeError: xxx is not a function“

完整报错：
vuexError in v-on handler: “TypeError: this.saveSearch is not a function”
报错原因：

    ...mapMutations(['saveSearch']),

这行写错位置了
要写在methods里面
正确的位置：

methods: {
    search () {
      console.log(this.select)
      if (this.select === 1) {
        // this.saveUser(this.state, {uid: this.input})
        this.saveSearch({sname: this.input})
      } else if (this.select === 2) {
        this.saveSearch({sname: null, sauthor: this.input, sid: null, scate: null})
      } else {
        this.saveSearch({sid: this.input})
      }
      this.$router.push('/search')
    },
    ...mapMutations(['saveSearch'])
  }

浪费了半个小时