fix(Form): add dynamicRequireds when update rules

doc/components/demos/form/form7.vue

@@ -0,0 +1,65 @@
+<template>
+    <Form
+            ref="testForm"
+            :showErrorTip="true"
+            :rules="validationRules"
+            :validOnChange="true"
+            :model="data">
+        <FormItem label="类型" prop="type" :required="true">
+            <Select v-model="data.type" autosize :datas="typeParams"></Select>
+        </FormItem>
+        <FormItem label="配置项1" prop="item1" key="item1" :required="true" v-if="data.type>=2">
+            <input
+                    type="text"
+                    v-model="data.item1"
+                    placeholder="请输入配置项1"
+            />
+        </FormItem>
+        <FormItem label="配置项2" prop="item2" key="item2" :required="true" v-if="data.type>=3">
+            <input
+                    type="text"
+                    v-model="data.item2"
+                    placeholder="请输入配置项2"/>
+        </FormItem>
+        <FormItem label="配置项3" prop="item3" key="item3" :required="true" v-if="data.type>=4">
+            <input
+                    type="text"
+                    v-model="data.item3"
+                    placeholder="请输入配置项3"/>
+        </FormItem>
+        <FormItem>
+            <Button color="primary" @click="updateRules">重置rules</Button>
+            <Button color="primary" @click="submit">提交</Button>
+        </FormItem>
+    </Form>
+</template>
+<script>
+export default {
+  name: 'test',
+  data() {
+    return {
+      typeParams: { 1: '类型1', 2: '类型2', 3: '类型3', 4: '类型4' },
+      data: {
+        type: null,
+        item1: null,
+        item2: null,
+        item3: null
+
+      },
+      validationRules: {}
+    };
+  },
+  methods: {
+    updateRules() {
+      this.validationRules = {};
+    },
+    submit() {
+      let validResult = this.$refs.testForm.valid();
+      console.log(validResult);
+      if (validResult.result) {
+        this.$Message('验证成功');
+      }
+    }
+  }
+};
+</script>

src/components/form/form.vue

@@ -111,6 +111,9 @@ export default {
       handler() {
         if (this.validator) {
           if (this.rules) this.validator.updateRule(this.rules);
+          this.dynamicRequireds.forEach(item => {
+            this.validator.setConfig(item, { required: true });
+          });
         } else if (this.model && this.rules) {
           this.validator = new Validator(this.rules);
         }
@@ -186,9 +189,7 @@ export default {
       }
       this.initRequires();
       if (!this.validator) return false;
-      this.$nextTick(() => {
-        this.validator.setConfig(prop, options);
-      });
+      this.validator.setConfig(prop, options);
     },
     updateErrorMessage(prop, label) {
       let message = {
@@ -215,7 +216,10 @@ export default {
       return message;
     },
     removeProp(prop) {
-      delete this.dynamicRequireds[prop];
+      let index = this.dynamicRequireds.indexOf(prop);
+      if (index > -1) {
+        this.dynamicRequireds.splice(index, 1);
+      }
       this.setConfig(prop, { required: false });
     },
     renderMessage(returnResult) {