q-checkbox如何添加rules规则校验

在外部添加一个QField

              <q-field
                ref="toggle"
                :value="AgreeRadio"
                :rules="[
                  val => (val == true) || 'RadioText'
                ]"
                borderless
                dense
              >
                <template v-slot:control>
                  <q-checkbox
                    v-model="AgreeRadio"
                    label="RadioText"
                  />
                </template>
              </q-field>