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< li class = "header" > Introduction< / li >
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< li class = "chapter " data-level = "1.1" data-path = "../" >
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Introduction
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< li class = "header" > Basics< / li >
< li class = "chapter " data-level = "2.1" data-path = "route_syntax.html" >
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< a href = "route_syntax.html" >
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Route Syntax
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Router
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< li class = "chapter " data-level = "2.3" data-path = "path_based_routing.html" >
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Path-based Routing
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< li class = "chapter " data-level = "2.4" data-path = "name_based_routing.html" >
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Name-based Routing
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< li class = "chapter " data-level = "2.5" data-path = "route_data.html" >
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< a href = "route_data.html" >
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Route Data
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< / a >
< / li >
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< li class = "chapter " data-level = "2.6" data-path = "route_data_validation.html" >
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< a href = "route_data_validation.html" >
Route Data Validation
< / a >
< / li >
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< li class = "chapter " data-level = "2.7" data-path = "route_conflicts.html" >
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Route Conflicts
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< / a >
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Error Messages
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< / li >
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< li class = "header" > Coercion< / li >
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< li class = "chapter " data-level = "3.1" data-path = "../coercion/coercion.html" >
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Coercion Explained
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Plumatic Schema
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< li class = "chapter " data-level = "3.3" data-path = "../coercion/clojure_spec_coercion.html" >
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< a href = "../coercion/clojure_spec_coercion.html" >
Clojure.spec
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< li class = "chapter " data-level = "3.4" data-path = "../coercion/data_spec_coercion.html" >
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< a href = "../coercion/data_spec_coercion.html" >
Data-specs
< / a >
< / li >
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< li class = "header" > Ring< / li >
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< li class = "chapter " data-level = "4.1" data-path = "../ring/ring.html" >
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< a href = "../ring/ring.html" >
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Ring-router
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< / a >
< / li >
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< li class = "chapter " data-level = "4.2" data-path = "../ring/reverse_routing.html" >
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< a href = "../ring/reverse_routing.html" >
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Reverse-routing
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< / a >
< / li >
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< li class = "chapter " data-level = "4.3" data-path = "../ring/default_handler.html" >
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< a href = "../ring/default_handler.html" >
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Default handler
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< / a >
< / li >
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< li class = "chapter " data-level = "4.4" data-path = "../ring/slash_handler.html" >
< a href = "../ring/slash_handler.html" >
Slash handler
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< / li >
< li class = "chapter " data-level = "4.5" data-path = "../ring/static.html" >
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< a href = "../ring/static.html" >
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Static Resources
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< / li >
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< li class = "chapter " data-level = "4.6" data-path = "../ring/dynamic_extensions.html" >
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< a href = "../ring/dynamic_extensions.html" >
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Dynamic Extensions
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< / a >
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< / li >
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< li class = "chapter " data-level = "4.7" data-path = "../ring/data_driven_middleware.html" >
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< a href = "../ring/data_driven_middleware.html" >
Data-driven Middleware
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< / li >
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< li class = "chapter " data-level = "4.8" data-path = "../ring/transforming_middleware_chain.html" >
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< a href = "../ring/transforming_middleware_chain.html" >
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Transforming Middleware Chain
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< / a >
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< / li >
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< li class = "chapter " data-level = "4.9" data-path = "../ring/middleware_registry.html" >
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< a href = "../ring/middleware_registry.html" >
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Middleware Registry
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< / a >
< / li >
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< li class = "chapter " data-level = "4.10" data-path = "../ring/default_middleware.html" >
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< a href = "../ring/default_middleware.html" >
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Default Middleware
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< / a >
< / li >
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< li class = "chapter " data-level = "4.11" data-path = "../ring/content_negotiation.html" >
< a href = "../ring/content_negotiation.html" >
Content Negotiation
< / a >
< / li >
< li class = "chapter " data-level = "4.12" data-path = "../ring/coercion.html" >
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< a href = "../ring/coercion.html" >
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Ring Coercion
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< / a >
< / li >
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< li class = "chapter " data-level = "4.13" data-path = "../ring/route_data_validation.html" >
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< a href = "../ring/route_data_validation.html" >
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Route Data Validation
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< / a >
< / li >
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< li class = "chapter " data-level = "4.14" data-path = "../ring/compiling_middleware.html" >
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< a href = "../ring/compiling_middleware.html" >
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Compiling Middleware
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< / a >
< / li >
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< li class = "chapter " data-level = "4.15" data-path = "../ring/swagger.html" >
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< a href = "../ring/swagger.html" >
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Swagger Support
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< / a >
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< / li >
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< li class = "chapter " data-level = "4.16" data-path = "../ring/RESTful_form_methods.html" >
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< a href = "../ring/RESTful_form_methods.html" >
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RESTful form methods
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< / li >
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< li class = "header" > HTTP< / li >
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< li class = "chapter " data-level = "5.1" data-path = "../http/interceptors.html" >
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< a href = "../http/interceptors.html" >
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Interceptors
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< / a >
< / li >
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< li class = "chapter " data-level = "5.2" data-path = "../http/pedestal.html" >
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< a href = "../http/pedestal.html" >
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Pedestal
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< / a >
< / li >
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< li class = "chapter " data-level = "5.3" data-path = "../http/sieppari.html" >
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< a href = "../http/sieppari.html" >
Sieppari
< / a >
< / li >
< li class = "chapter " data-level = "5.4" data-path = "../http/default_interceptors.html" >
< a href = "../http/default_interceptors.html" >
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Default Interceptors
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< / a >
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< / li >
< li class = "chapter " data-level = "5.5" data-path = "../http/transforming_interceptor_chain.html" >
< a href = "../http/transforming_interceptor_chain.html" >
Transforming Interceptor Chain
< / a >
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< / li >
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< li class = "header" > Frontend< / li >
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< li class = "chapter " data-level = "6.1" data-path = "../frontend/basics.html" >
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< a href = "../frontend/basics.html" >
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Basics
< / a >
< / li >
< li class = "chapter " data-level = "6.2" data-path = "../frontend/browser.html" >
< a href = "../frontend/browser.html" >
Browser integration
< / a >
< / li >
< li class = "chapter " data-level = "6.3" data-path = "../frontend/controllers.html" >
< a href = "../frontend/controllers.html" >
Controllers
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< / a >
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< / li >
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< li class = "header" > Advanced< / li >
< li class = "chapter " data-level = "7.1" data-path = "../advanced/configuring_routers.html" >
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< a href = "../advanced/configuring_routers.html" >
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Configuring Routers
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< / a >
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< / li >
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< li class = "chapter " data-level = "7.2" data-path = "../advanced/composing_routers.html" >
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< a href = "../advanced/composing_routers.html" >
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Composing Routers
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< / a >
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< / li >
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< li class = "chapter " data-level = "7.3" data-path = "../advanced/different_routers.html" >
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< a href = "../advanced/different_routers.html" >
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Different Routers
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< / a >
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< / li >
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< li class = "chapter " data-level = "7.4" data-path = "../advanced/route_validation.html" >
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< a href = "../advanced/route_validation.html" >
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Route Validation
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< / a >
< / li >
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< li class = "chapter " data-level = "7.5" data-path = "../advanced/dev_workflow.html" >
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< a href = "../advanced/dev_workflow.html" >
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Dev Workflow
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< / a >
< / li >
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< li class = "chapter " data-level = "7.6" data-path = "../advanced/shared_routes.html" >
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< a href = "../advanced/shared_routes.html" >
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Shared Routes
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< / a >
< / li >
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< li class = "header" > Misc< / li >
< li class = "chapter " data-level = "8.1" data-path = "../performance.html" >
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< a href = "../performance.html" >
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Performance
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< / a >
< / li >
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< li class = "chapter " data-level = "8.2" data-path = "../development.html" >
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< a href = "../development.html" >
Development Instructions
< / a >
< / li >
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< li class = "chapter " data-level = "8.3" data-path = "../faq.html" >
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< a href = "../faq.html" >
FAQ
< / a >
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Published with GitBook
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<!-- Title -->
< h1 >
< i class = "fa fa-circle-o-notch fa-spin" > < / i >
< a href = ".." > Router< / a >
< / h1 >
< / div >
< div class = "page-wrapper" tabindex = "-1" role = "main" >
< div class = "page-inner" >
< div id = "book-search-results" >
< div class = "search-noresults" >
< section class = "normal markdown-section" >
< h1 id = "router" > Router< / h1 >
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< p > Routes are just data and to do routing, we need a router instance satisfying the < code > reitit.core/Router< / code > protocol. Routers are created with < code > reitit.core/router< / code > function, taking the raw routes and optionally an options map.< / p >
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< p > The < code > Router< / code > protocol:< / p >
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< pre > < code class = "lang-clj" > (< span class = "hljs-name" > < span class = "hljs-builtin-name" > defprotocol< / span > < / span > Router
(< span class = "hljs-name" > router-name< / span > [this])
(< span class = "hljs-name" > routes< / span > [this])
(< span class = "hljs-name" > options< / span > [this])
(< span class = "hljs-name" > route-names< / span > [this])
(< span class = "hljs-name" > match-by-path< / span > [this path])
(< span class = "hljs-name" > match-by-name< / span > [this name] [this name params]))
< / code > < / pre >
< p > Creating a router:< / p >
< pre > < code class = "lang-clj" > (< span class = "hljs-name" > require< / span > ' [reitit.core < span class = "hljs-symbol" > :as< / span > r])
(< span class = "hljs-name" > < span class = "hljs-builtin-name" > def< / span > < / span > router
(< span class = "hljs-name" > r/router< / span >
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[< span class = "hljs-string" > " /api" < / span >
[< span class = "hljs-string" > " /ping" < / span > < span class = "hljs-symbol" > ::ping< / span > ]
[< span class = "hljs-string" > " /user/:id" < / span > < span class = "hljs-symbol" > ::user< / span > ]]))
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< / code > < / pre >
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< p > Name of the created router:< / p >
< pre > < code class = "lang-clj" > (< span class = "hljs-name" > r/router-name< / span > router)
< span class = "hljs-comment" > ; :mixed-router< / span >
< / code > < / pre >
< p > The flattened route tree:< / p >
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< pre > < code class = "lang-clj" > (< span class = "hljs-name" > r/routes< / span > router)
< span class = "hljs-comment" > ; [[" /api/ping" {:name :user/ping}]< / span >
< span class = "hljs-comment" > ; [" /api/user/:id" {:name :user/user}]]< / span >
< / code > < / pre >
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< p > With a router instance, we can do < a href = "path_based_routing.html" > Path-based routing< / a > or < a href = "name_based_routing.html" > Name-based (Reverse) routing< / a > .< / p >
< h2 id = "more-details" > More details< / h2 >
< p > Router options:< / p >
< pre > < code class = "lang-clj" > (< span class = "hljs-name" > r/options< / span > router)
{< span class = "hljs-symbol" > :lookup< / span > #object[...]
< span class = "hljs-symbol" > :expand< / span > #object[...]
< span class = "hljs-symbol" > :coerce< / span > #object[...]
< span class = "hljs-symbol" > :compile< / span > #object[...]
< span class = "hljs-symbol" > :conflicts< / span > #object[...]}
< / code > < / pre >
< p > Route names:< / p >
< pre > < code class = "lang-clj" > (< span class = "hljs-name" > r/route-names< / span > router)
< span class = "hljs-comment" > ; [:user/ping :user/user]< / span >
< / code > < / pre >
< p > The compiled route tree:< / p >
< pre > < code class = "lang-clj" > (< span class = "hljs-name" > r/routes< / span > router)
< span class = "hljs-comment" > ; [[" /api/ping" {:name :user/ping} nil]< / span >
< span class = "hljs-comment" > ; [" /api/user/:id" {:name :user/user} nil]]< / span >
< / code > < / pre >
< h3 id = "composing" > Composing< / h3 >
< p > As routes are defined as plain data, it' s easy to merge multiple route trees into a single router< / p >
< pre > < code class = "lang-clj" > (< span class = "hljs-name" > < span class = "hljs-builtin-name" > def< / span > < / span > user-routes
[[< span class = "hljs-string" > " /users" < / span > < span class = "hljs-symbol" > ::users< / span > ]
[< span class = "hljs-string" > " /users/:id" < / span > < span class = "hljs-symbol" > ::user< / span > ]])
(< span class = "hljs-name" > < span class = "hljs-builtin-name" > def< / span > < / span > admin-routes
[< span class = "hljs-string" > " /admin" < / span >
[< span class = "hljs-string" > " /ping" < / span > < span class = "hljs-symbol" > ::ping< / span > ]
[< span class = "hljs-string" > " /users" < / span > < span class = "hljs-symbol" > ::users< / span > ]])
(< span class = "hljs-name" > r/router< / span >
[admin-routes
user-routes])
< / code > < / pre >
< p > Merged route tree:< / p >
< pre > < code class = "lang-clj" > (< span class = "hljs-name" > r/routes< / span > router)
< span class = "hljs-comment" > ; [[" /admin/ping" {:name :user/ping}]< / span >
< span class = "hljs-comment" > ; [" /admin/db" {:name :user/db}]< / span >
< span class = "hljs-comment" > ; [" /users" {:name :user/users}]< / span >
< span class = "hljs-comment" > ; [" /users/:id" {:name :user/user}]]< / span >
< / code > < / pre >
< p > More details on < a href = "../advanced/composing_routers.html" > composing routers< / a > .< / p >
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< h3 id = "behind-the-scenes" > Behind the scenes< / h3 >
< p > When router is created, the following steps are done:< / p >
< ul >
< li > route tree is flattened< / li >
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< li > route arguments are expanded (via < code > :expand< / code > option)< / li >
< li > routes are coerced (via < code > :coerce< / code > options)< / li >
< li > route tree is compiled (via < code > :compile< / code > options)< / li >
< li > < a href = "advanced/route_conflicts.md" > route conflicts< / a > are resolved (via < code > :conflicts< / code > options)< / li >
< li > optionally, route data is validated (via < code > :validate< / code > options)< / li >
< li > < a href = "../advanced/different_routers.html" > router implementation< / a > is automatically selected (or forced via < code > :router< / code > options) and created< / li >
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