fix(model): fix field empty bug 🐛

Closes #195

src/validations/base.js

@@ -40,7 +40,7 @@ export default class BaseValidation {
     const scope = this._getScope()
     const model = this._model
     if (model) {
-      el.value = this._evalModel(model, this._filters) || ''
+      el.value = this._evalModel(model, this._filters)
       this._unwatch = scope.$watch(model, (val, old) => {
         if (val !== old) {
           if (this.guardValidate(el, 'input')) {
@@ -260,11 +260,13 @@ export default class BaseValidation {
   _evalModel (model, filters) {
     const scope = this._getScope()
 
+    let val = null
     if (filters) {
-      let val = scope.$get(model)
+      val = scope.$get(model)
       return filters ? this._applyFilters(val, null, filters) : val
     } else {
-      return scope.$get(model)
+      val = scope.$get(model)
+      return val === undefined || val === null ? '' : val
     }
   }
 

test/specs/index.js

@@ -33,3 +33,4 @@ require('./reset')
 require('./validate')
 require('./initial')
 require('./async')
+require('./issues')

test/specs/issues.js

@@ -0,0 +1,33 @@
+import assert from 'power-assert'
+import Vue from 'vue'
+
+
+describe('github issues', () => {
+  let el, vm
+
+  beforeEach(() => {
+    el = document.createElement('div')
+  })
+
+
+  describe('#195', () => {
+    beforeEach((done) => {
+      el.innerHTML = '<validator name="validator1">'
+        + '<form novalidate>'
+        + '<input type="text" v-model="value" number>'
+        + '<input type="text" v-model="value" number v-validate:value="[\'required\']">'
+        + '</form>'
+        + '</validator>'
+      vm = new Vue({ el: el, data: { value: 0 } })
+      vm.$nextTick(done)
+    })
+
+    it('should be validated', (done) => {
+      let field1 = el.getElementsByTagName('input')[0]
+      let field2 = el.getElementsByTagName('input')[1]
+      assert(field1.value === '0')
+      assert(field2.value === '0')
+      done()
+    })
+  })
+})