三目运算符的问题，promise

Question

为什么这里的三目运算符没办法成功走then里的代码呢，单独写POST或者PUT就可以，POST或者PUT里返回的是promise，axios的封装接口

          const { bankName, cnapsNum, depositlBankName, id, status } = this.formData
          const data = { bankName, cnapsNum, depositlBankName, id, status }
          this.formData.id ? this.$commonPut('fund', 'fundbankinfo', data) : this.$commonPost('fund', 'fundbankinfo', data)
            .then(res => {
              console.log('res==========>', res)
              if (res.code === 200) {
                this.$message({
                  type: 'success',
                  message: '保存成功'
                })
              }
              this.back()
            })
            .catch(error => console.log('error=====>', error))

Answer 1

 let res = this.formData.id ? this.$commonPut('fund', 'fundbankinfo', data) : this.$commonPost('fund', 'fundbankinfo', data)
res.then(