Show list of all categories
In the ShopController, first inject an instance of CategoryService, then get all categories bu calling categoryService#findAll
grails-app/controllers/ShopController.groovy
def categoryService
def index() {
[ categories: categoryService.findAll() ]
}
Now, the model contains a list all the categories in the camera store, this list encapsulated in Page object.
Page object is a container which wrap a collection of objects,
it implements Iterable so you can iterate over its content using the standard for loop, and can be easily used within thymeleaf view templates.
We will use this collection of Category objects to populate the top navigation menu of the store.
grails-app/views/layouts/layout.gsp
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav" id="category_menu">
<li><a href="/products">All</a></li>
<g:each in="${categories}" var="cat">
<g:if test="${cat.name != 'Uncategorized'}">
<li>
<g:link controller="shop" action="categories" params="[category_id: cat.id]">${cat?.title}</g:link>
</li>
</g:if>
</g:each>
<li><a href="#" id="show_search_box"><span class="glyphicon glyphicon-search"></span></a></li>
</ul>
</div>
Display list of all brands
Using the same technique, We can get a list of the available brands, and display them in the sidebar navigation. for example in the details action method:
grails-app/controllers/ShopController.groovy
def categoryService
def brandService
def details() {
[
brands: brandService.findAll(),
categories: categoryService.findAll(),
]
}
Then display it in the sidebar
grails-app/views/layouts/products_layout.gsp
<div class="product-listy">
<h2>Browse By Brand</h2>
<ul class="product-list">
<g:each in="${brands}" var="brand">
<li><g:link controller="shop" action="brands"
params="[brand_id: brand.id]" >${brand.title}</g:link></li>
</g:each>
</ul>
</div>
Browse products
Likewise, We can obtain and show a list of all products.
grails-app/controllers/ShopController.groovy
def products() {
[
products: productService.findAll(),
brands: brandService.findAll(),
categories: categoryService.findAll(),
featured: collectionService.findByName("featured"),
cart: shoppingCartService.get()
]
}
To show the products, iterate over the product collection
grails-app/views/shop/products.gsp
<ul>
<g:each in="${products}" var="p">
<li>
<div>
<a class="cbp-vm-image" href="/products/${p.id}">
<div class="simpleCart_shelfItem">
<div class="view view-first">
<div class="inner_content clearfix">
<div class="product_image">
<img src="${p.mainPhoto.url}" class="img-responsive" alt=""/>
<div class="mask">
<div class="info">Quick View</div>
</div>
<div class="product_container">
<div class="cart-left">
<p class="title">${p.title}</p>
</div>
<div class="pricey">
<span class="item_price">$ ${p.price}</span>
</div>
<div class="clearfix"></div>
</div>
</div>
</div>
</div>
</div>
</a>
<div class="cbp-vm-details">${p.shortDescription}</div>
<a class="cbp-vm-icon cbp-vm-add item_add add_to_cart_button" data-product_id="${p.id}" href="#">Add to cart</a>
</div>
</li>
</g:each>
</ul>
This may looks very boring and repetitive, but we want to make a point out of that: the Java SDK has a very consistent, once you learned a small subset you ‘ll find the rest of it very familiar and predectable.
Filter products by category
Now, Let’s see how to filter this list of products by category
there is search method in the ProductService, but because filtering products by category and brand are a frequently used operations,
there is a dedicated methods for these operations: findAllByCategory and findAllByBrand respectively.
All search methods return Page object wrapping the result set, so it is possible to use the same view template to display the search results.
grails-app/controllers/ShopController.groovy
def categories() {
render view: "products", model:[
products: productService.search(category: params.category_id),
brands: brandService.findAll(),
categories: categoryService.findAll(),
featured: collectionService.findByName("featured"),
cart: shoppingCartService.get()
]
}
Filter products by brand
Likewise, You can filter products by brand, just use the findAllByBrand instead.
grails-app/controllers/ShopController.groovy
def brands() {
render view: "products", model: [
products: productService.search(brand: params.brand_id),
brands: brandService.findAll(),
categories: categoryService.findAll(),
featured: collectionService.findByName("featured"),
cart: shoppingCartService.get()
]
}
Viewing product details
You can get single product by its ID, just use productService#findById, the code is straightforward:
grails-app/controllers/ShopController.groovy
def details() {
[
product: productService.findById(params.product_id),
brands: brandService.findAll(),
categories: categoryService.findAll(),
featured: collectionService.findByName("featured"),
cart: shoppingCartService.get()
]
}
grails-app/views/shop/details.gsp
<div class="new-product">
<div class="col-md-5 zoom-grid">
<div class="flexslider">
<ul class="slides">
<g:each in="${product.photos}" var="ph">
<li data-thumb="${ph.url}">
<div class="thumb-image">
<img src="${ph.url}" data-imagezoom="true" class="img-responsive" alt="" />
</div>
</li>
</g:each>
</ul>
</div>
</div>
<div class="col-md-7 dress-info">
<div class="dress-name">
<h3>${product.title}</h3>
<span>$ ${product.price}</span>
<div class="clearfix"></div>
<p>${product.description}</p>
</div>
<div class="purchase">
<a class="cbp-vm-icon cbp-vm-add item_add add_to_cart_button"
href="#" data-product_id="${product.id}">Add To Cart</a>
<div class="clearfix"></div>
</div>
</div>
<div class="clearfix"></div>
</div>
Getting Collections
For the sake of completeness, we demonstrate how to get and display Collections,
Also this is a good opportunity to show you how you can use Collections in your own projects.
grails-app/controllers/ShopController.groovy
def collectionService
def index() {
[
collections: collectionService.findAll()
]
}
In the home-page of the store, we use Collections to show customers selected collections of our products.
We use collection for the available deals, another for the featured products, and one for the newly added products.
grails-app/views/shop/index.gsp
<g:each in="${collections}" var="coll">
<div class="container collections">
<h3 class="like text-center" >${coll.title}</h3>
<ul id="${coll.name}" class="flexiselDemo3">
<g:each in="${coll.products}" var="p">
<li>
<g:link controller="shop" action="details" params="[product_id: p.id]">
<img src="${p.mainPhoto.url}" class="img-responsive" alt="" />
</g:link>
<div class="product liked-product simpleCart_shelfItem">
<g:link controller="shop" action="details"
params="[product_id: p.id]" class="like_name" >${p.title}</g:link>
<p><a class="item_add add_to_cart_button" href="#"
data-product_id="${p.id}"><i></i>
<span class=" item_price">$ ${p.price}</span></a></p>
</div>
</li>
</g:each>
</ul>
</div>
</g:each>
You can get single collection by name, use collectionService#findByName
grails-app/controllers/ShopController.groovy
def details() {
[
product: productService.findById(params.product_id),
brands: brandService.findAll(),
categories: categoryService.findAll(),
featured: collectionService.findByName("featured"),
cart: shoppingCartService.get()
]
}
We use this in the product details shop/single.html to show featured products.
grails-app/views/layouts/products_layout.gsp
<div class="container">
<h3 class="like text-center">${featured.title}</h3>
<ul id="flexiselDemo3">
<g:each in="${featured.products}" var="p">
<li>
<g:link controller="shop" action="details" params="[product_id: p.id]">
<img src="${p.mainPhoto.url}" style="width: 220px;" class="img-responsive"/>
</g:link>
<div class="product liked-product simpleCart_shelfItem">
<g:link controller="shop" action="details"
params="[product_id: p.id]" class="like_name" >${p.title}</g:link>
<p><a class="item_add add_to_cart_button" href="#"
th:attr="data-product_id=${p.id}"><i></i>
<span class=" item_price" th:text="${p.price}">$759</span></a></p>
</div>
</li>
</g:each>
</ul>
</div>