fix two-way binding for components inside each-blocks - closes #356

src/generators/dom/visitors/attributes/binding/index.js

@@ -127,8 +127,10 @@ export default function createBinding ( generator, node, attribute, current, loc
 			});
 		` );
 
+		const dependencies = parts[0] in current.contexts ? current.contextDependencies[ parts[0] ] : [ parts[0] ];
+
 		local.update.addBlock( deindent`
-			if ( !${local.name}_updating && '${parts[0]}' in changed ) {
+			if ( !${local.name}_updating && ${dependencies.map( dependency => `'${dependency}' in changed` ).join( '||' )} ) {
 				${local.name}._set({ ${attribute.name}: ${contextual ? attribute.value : `root.${attribute.value}`} });
 			}
 		` );

src/generators/server-side-rendering/visitors/Component.js

@@ -41,6 +41,11 @@ export default {
 
 				return `${attribute.name}: ${value}`;
 			})
+			.concat( bindings.map( binding => {
+				const parts = binding.value.split( '.' );
+				const value = parts[0] in generator.current.contexts ? binding.value : `root.${binding.value}`;
+				return `${binding.name}: ${value}`;
+			}))
 			.join( ', ' );
 
 		const expression = node.name === ':Self' ? generator.name : `template.components.${node.name}`;

test/generator/samples/component-binding-each-object/Widget.html

@@ -0,0 +1 @@
+<span>{{value.id}}</span>

test/generator/samples/component-binding-each-object/_config.js

@@ -0,0 +1,24 @@
+export default {
+	data: {
+		a: [{ id: 'foo' }, { id: 'bar' }, { id: 'baz' }]
+	},
+
+	html: `
+		<span>foo</span><span>bar</span><span>baz</span>
+	`,
+
+	test ( assert, component, target ) {
+		component.set({
+			a: [
+				{ id: 'yep' },
+				{ id: 'nope' }
+			]
+		});
+
+		assert.htmlEqual( target.innerHTML, `
+			<span>yep</span><span>nope</span>
+		` );
+
+		component.destroy();
+	}
+};

test/generator/samples/component-binding-each-object/main.html

@@ -0,0 +1,13 @@
+{{#each a as x}}
+	<Widget bind:value='x'/>
+{{/each}}
+
+<script>
+	import Widget from './Widget.html';
+
+	export default {
+		components: {
+			Widget
+		}
+	};
+</script>