From e45404d3b3af1c96f65f3965ee3a6abe8c0548be Mon Sep 17 00:00:00 2001
From: vellengs <vellengs@qq.com>
Date: Sat, 17 Mar 2018 14:01:35 +0800
Subject: [PATCH] Update form.component.ts
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fixed schema support issue,
schema.properties can be empty.  for example:
```
      "dateArrayRange": {
            "type": "array",
            "items": {
                "type": "string"
            },
            "title": "日期范围",
            "default": [
                "2018-01-02",
                "2018-02-03"
            ],
            "widget": {
                "id": "date-range",
                "format": "YYYY-MM-DD"
            }
        }
```
the schema is only part of
```
 {
                "type": "string"
 }
```
---
 lib/src/form.component.ts | 40 ++++++++++++++++++++-------------------
 1 file changed, 21 insertions(+), 19 deletions(-)

diff --git a/lib/src/form.component.ts b/lib/src/form.component.ts
index 17f09c5..d9c7a8b 100644
--- a/lib/src/form.component.ts
+++ b/lib/src/form.component.ts
@@ -70,29 +70,31 @@ export class FormComponent implements OnChanges {
     private coverProperty(schema: SFSchema) {
         const isHorizontal = this.layout === 'horizontal';
 
-        Object.keys(schema.properties).forEach(key => {
-            const p = schema.properties[key];
-            if (isHorizontal) {
-                if (schema.span_label_fixed) {
-                    if (!p.span_label_fixed) p.span_label_fixed = schema.span_label_fixed;
+         if (schema.properties) {
+            Object.keys(schema.properties).forEach(key => {
+                const p = schema.properties[key];
+                if (isHorizontal) {
+                    if (schema.span_label_fixed) {
+                        if (!p.span_label_fixed) p.span_label_fixed = schema.span_label_fixed;
+                    } else {
+                        if (!p.span_label) p.span_label = typeof schema.span_label === 'undefined' ? 5 : schema.span_label;
+                        if (!p.span_control) p.span_control = typeof schema.span_control === 'undefined' ? 19 : schema.span_control;
+                        if (!p.offset_control) p.offset_control = typeof schema.offset_control === 'undefined' ? null : schema.offset_control;
+                    }
                 } else {
-                    if (!p.span_label) p.span_label = typeof schema.span_label === 'undefined' ? 5 : schema.span_label;
-                    if (!p.span_control) p.span_control = typeof schema.span_control === 'undefined' ? 19 : schema.span_control;
-                    if (!p.offset_control) p.offset_control = typeof schema.offset_control === 'undefined' ? null : schema.offset_control;
+                    p.span_label = null;
+                    p.span_control = null;
+                    p.offset_control = null;
                 }
-            } else {
-                p.span_label = null;
-                p.span_control = null;
-                p.offset_control = null;
-            }
 
-            if (p.items && p.type === 'array') {
-                this.coverProperty(p.items);
-            }
+                if (p.items && p.type === 'array') {
+                    this.coverProperty(p.items);
+                }
 
-            if (p.properties && Object.keys(p.properties).length)
-                this.coverProperty(p);
-        });
+                if (p.properties && Object.keys(p.properties).length)
+                    this.coverProperty(p);
+            });
+        }
     }
 
     private coverButtonProperty(schema: SFSchema) {