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Gestión de Peticiones

Recursos

A menudo las aplicaciones Web necesitan desarrollar end-points muy parecidos al modelo CRUD. Para reducir la complejidad que esto añade, Buffalo soporta el concepto de “Recurso”.

La interfaz github.com/gobuffalo/buffalo#Resource permite a Buffalo asignar rutas comunes y responder a solicitudes comunes.

Desde 0.14.1

type Resource interface {
	List(Context) error
	Show(Context) error
	Create(Context) error
	Update(Context) error
	Destroy(Context) error
}

La interfaz github.com/gobuffalo/buffalo#Resource se ha reducido en la versión v0.14.1. Los métodos New y Edit, que sirven a los formularios HTML para editar el recurso, son ahora opcionales.

Así es como se veía la interfaz antes:

type Resource interface {
	List(Context) error
	Show(Context) error
	New(Context) error
	Create(Context) error
	Edit(Context) error
	Update(Context) error
	Destroy(Context) error
}

Uso de Recursos

Luego de implementar los métodos necesarios de la interfaz github.com/gobuffalo/buffalo#Resource, el recurso puede ser mapeado en la aplicación utilizando el método github.com/gobuffalo/buffalo#App.Resource.

// action/users.go
type UsersResource struct{ }

func (u UsersResource) List(c buffalo.Context) error {
  // do work
}

func (u UsersResource) Show(c buffalo.Context) error {
  // do work
}

func (u UsersResource) Create(c buffalo.Context) error {
  // do work
}

func (u UsersResource) Update(c buffalo.Context) error {
  // do work
}

func (u UsersResource) Destroy(c buffalo.Context) error {
  // do work
}

Mapeando el Recurso en app.go:

// actions/app.go
app.Resource("/users", UsersResource{})

El código de ejemplo anterior sería el equivalente al siguente:

// actions/app.go
ur := UsersResource{}

app.GET("/users", ur.List)
app.GET("/users/{user_id}", ur.Show)
app.POST("/users", ur.Create)
app.PUT("/users/{user_id}", ur.Update)
app.DELETE("/users/{user_id}", ur.Destroy)

Produciría una tabla de rutas que luce similar a la siguiente:

$ buffalo routes

METHOD | HOST                  | PATH                    | ALIASES | NAME                 | HANDLER
------ | ----                  | ----                    | ------- | ----                 | -------
GET    | http://127.0.0.1:3000 | /users/                 |         | usersPath            | coke/actions.UsersResource.List
POST   | http://127.0.0.1:3000 | /users/                 |         | usersPath            | coke/actions.UsersResource.Create
GET    | http://127.0.0.1:3000 | /users/{user_id}/       |         | userPath             | coke/actions.UsersResource.Show
PUT    | http://127.0.0.1:3000 | /users/{user_id}/       |         | userPath             | coke/actions.UsersResource.Update
DELETE | http://127.0.0.1:3000 | /users/{user_id}/       |         | userPath             | coke/actions.UsersResource.Destroy

Métodos de Recursos Opcionales

Desde 0.14.1

En la version v0.14.1 el github.com/gobuffalo/buffalo#Resource se redujo con los siguientes métodos que son ahora opcionales:

New(Context) error
Edit(Context) error

Cuando se implementan los métodos New y Edit se añade lo siguiente a la tabla de enrutamiento:

METHOD | HOST                   | PATH                   | ALIASES | NAME         | HANDLER
------ | ----                   | ----                   | ------- | ----         | -------
GET    | http://127.0.0.1:3000  | /users/new             |         | newUsersPath | coke/actions.UsersResource.New
GET    | http://127.0.0.1:3000  | /users/{user_id}/edit/ |         | editUserPath | coke/actions.UsersResource.Edit

Generando Recursos

El comando buffalo generate resource generará los modelos, las migraciones, el código Go y el HTML necesarios para el CRUD del recurso.

Cuando se ejecuta el generador en una aplicación API Buffalo generará código para cumplir con la interfaz github.com/gobuffalo/buffalo#Resource.

type Resource interface {
  List(Context) error
  Show(Context) error
  Create(Context) error
  Update(Context) error
  Destroy(Context) error
}

Cuando se ejecuta el generador en una aplicación web, Buffalo generará código para cumplir con la interfaz github.com/gobuffalo/buffalo#Resource, así como los métodos opcionales New y Edit

type Resource interface {
  List(Context) error
  Show(Context) error
  New(Context) error
  Create(Context) error
  Edit(Context) error
  Update(Context) error
  Destroy(Context) error
}

Ejemplo de Generación de Recursos

En este ejemplo Buffalo generará el código necesario para hacer un CRUD de un recurso llamado widget (Go: Widget) que tiene los siguientes atributos:

	Model Attribute	Go Type	DB type	Form Type
`title`	`Title`	`string`	`varchar`	`text`
`description`	`Description`	`nulls.String`	`varchar (nullable)`	`textarea`

$ buffalo generate resource widget title description:nulls.Text

package actions

import (
	"net/http"

	"coke/locales"
	"coke/models"
	"coke/public"

	"github.com/gobuffalo/buffalo"
	"github.com/gobuffalo/buffalo-pop/v3/pop/popmw"
	"github.com/gobuffalo/envy"
	csrf "github.com/gobuffalo/mw-csrf"
	forcessl "github.com/gobuffalo/mw-forcessl"
	i18n "github.com/gobuffalo/mw-i18n/v2"
	paramlogger "github.com/gobuffalo/mw-paramlogger"
	"github.com/unrolled/secure"
)

// ENV is used to help switch settings based on where the
// application is being run. Default is "development".
var ENV = envy.Get("GO_ENV", "development")

var (
	app *buffalo.App
	T   *i18n.Translator
)

// App is where all routes and middleware for buffalo
// should be defined. This is the nerve center of your
// application.
//
// Routing, middleware, groups, etc... are declared TOP -> DOWN.
// This means if you add a middleware to `app` *after* declaring a
// group, that group will NOT have that new middleware. The same
// is true of resource declarations as well.
//
// It also means that routes are checked in the order they are declared.
// `ServeFiles` is a CATCH-ALL route, so it should always be
// placed last in the route declarations, as it will prevent routes
// declared after it to never be called.
func App() *buffalo.App {
	if app == nil {
		app = buffalo.New(buffalo.Options{
			Env:         ENV,
			SessionName: "_coke_session",
		})

		// Automatically redirect to SSL
		app.Use(forceSSL())

		// Log request parameters (filters apply).
		app.Use(paramlogger.ParameterLogger)

		// Protect against CSRF attacks. https://www.owasp.org/index.php/Cross-Site_Request_Forgery_(CSRF)
		// Remove to disable this.
		app.Use(csrf.New)

		// Wraps each request in a transaction.
		//   c.Value("tx").(*pop.Connection)
		// Remove to disable this.
		app.Use(popmw.Transaction(models.DB))
		// Setup and use translations:
		app.Use(translations())

		app.GET("/", HomeHandler)

		app.Resource("/widgets", WidgetsResource{})
		app.ServeFiles("/", http.FS(public.FS())) // serve files from the public directory
	}

	return app
}

// translations will load locale files, set up the translator `actions.T`,
// and will return a middleware to use to load the correct locale for each
// request.
// for more information: https://gobuffalo.io/en/docs/localization
func translations() buffalo.MiddlewareFunc {
	var err error
	if T, err = i18n.New(locales.FS(), "en-US"); err != nil {
		app.Stop(err)
	}
	return T.Middleware()
}

// forceSSL will return a middleware that will redirect an incoming request
// if it is not HTTPS. "http://example.com" => "https://example.com".
// This middleware does **not** enable SSL. for your application. To do that
// we recommend using a proxy: https://gobuffalo.io/en/docs/proxy
// for more information: https://github.com/unrolled/secure/
func forceSSL() buffalo.MiddlewareFunc {
	return forcessl.Middleware(secure.Options{
		SSLRedirect:     ENV == "production",
		SSLProxyHeaders: map[string]string{"X-Forwarded-Proto": "https"},
	})
}

package actions

import (
	"fmt"
	"net/http"

	"github.com/gobuffalo/buffalo"
	"github.com/gobuffalo/pop/v6"
	"github.com/gobuffalo/x/responder"

	"coke/models"
)

// This file is generated by Buffalo. It offers a basic structure for
// adding, editing and deleting a page. If your model is more
// complex or you need more than the basic implementation you need to
// edit this file.

// Following naming logic is implemented in Buffalo:
// Model: Singular (Widget)
// DB Table: Plural (widgets)
// Resource: Plural (Widgets)
// Path: Plural (/widgets)
// View Template Folder: Plural (/templates/widgets/)

// WidgetsResource is the resource for the Widget model
type WidgetsResource struct {
	buffalo.Resource
}

// List gets all Widgets. This function is mapped to the path
// GET /widgets
func (v WidgetsResource) List(c buffalo.Context) error {
	// Get the DB connection from the context
	tx, ok := c.Value("tx").(*pop.Connection)
	if !ok {
		return fmt.Errorf("no transaction found")
	}

	widgets := &models.Widgets{}

	// Paginate results. Params "page" and "per_page" control pagination.
	// Default values are "page=1" and "per_page=20".
	q := tx.PaginateFromParams(c.Params())

	// Retrieve all Widgets from the DB
	if err := q.All(widgets); err != nil {
		return err
	}

	return responder.Wants("html", func(c buffalo.Context) error {
		// Add the paginator to the context so it can be used in the template.
		c.Set("pagination", q.Paginator)

		c.Set("widgets", widgets)
		return c.Render(http.StatusOK, r.HTML("widgets/index.plush.html"))
	}).Wants("json", func(c buffalo.Context) error {
		return c.Render(200, r.JSON(widgets))
	}).Wants("xml", func(c buffalo.Context) error {
		return c.Render(200, r.XML(widgets))
	}).Respond(c)
}

// Show gets the data for one Widget. This function is mapped to
// the path GET /widgets/{widget_id}
func (v WidgetsResource) Show(c buffalo.Context) error {
	// Get the DB connection from the context
	tx, ok := c.Value("tx").(*pop.Connection)
	if !ok {
		return fmt.Errorf("no transaction found")
	}

	// Allocate an empty Widget
	widget := &models.Widget{}

	// To find the Widget the parameter widget_id is used.
	if err := tx.Find(widget, c.Param("widget_id")); err != nil {
		return c.Error(http.StatusNotFound, err)
	}

	return responder.Wants("html", func(c buffalo.Context) error {
		c.Set("widget", widget)

		return c.Render(http.StatusOK, r.HTML("widgets/show.plush.html"))
	}).Wants("json", func(c buffalo.Context) error {
		return c.Render(200, r.JSON(widget))
	}).Wants("xml", func(c buffalo.Context) error {
		return c.Render(200, r.XML(widget))
	}).Respond(c)
}

// New renders the form for creating a new Widget.
// This function is mapped to the path GET /widgets/new
func (v WidgetsResource) New(c buffalo.Context) error {
	c.Set("widget", &models.Widget{})

	return c.Render(http.StatusOK, r.HTML("widgets/new.plush.html"))
}

// Create adds a Widget to the DB. This function is mapped to the
// path POST /widgets
func (v WidgetsResource) Create(c buffalo.Context) error {
	// Allocate an empty Widget
	widget := &models.Widget{}

	// Bind widget to the html form elements
	if err := c.Bind(widget); err != nil {
		return err
	}

	// Get the DB connection from the context
	tx, ok := c.Value("tx").(*pop.Connection)
	if !ok {
		return fmt.Errorf("no transaction found")
	}

	// Validate the data from the html form
	verrs, err := tx.ValidateAndCreate(widget)
	if err != nil {
		return err
	}

	if verrs.HasAny() {
		return responder.Wants("html", func(c buffalo.Context) error {
			// Make the errors available inside the html template
			c.Set("errors", verrs)

			// Render again the new.html template that the user can
			// correct the input.
			c.Set("widget", widget)

			return c.Render(http.StatusUnprocessableEntity, r.HTML("widgets/new.plush.html"))
		}).Wants("json", func(c buffalo.Context) error {
			return c.Render(http.StatusUnprocessableEntity, r.JSON(verrs))
		}).Wants("xml", func(c buffalo.Context) error {
			return c.Render(http.StatusUnprocessableEntity, r.XML(verrs))
		}).Respond(c)
	}

	return responder.Wants("html", func(c buffalo.Context) error {
		// If there are no errors set a success message
		c.Flash().Add("success", T.Translate(c, "widget.created.success"))

		// and redirect to the show page
		return c.Redirect(http.StatusSeeOther, "/widgets/%v", widget.ID)
	}).Wants("json", func(c buffalo.Context) error {
		return c.Render(http.StatusCreated, r.JSON(widget))
	}).Wants("xml", func(c buffalo.Context) error {
		return c.Render(http.StatusCreated, r.XML(widget))
	}).Respond(c)
}

// Edit renders a edit form for a Widget. This function is
// mapped to the path GET /widgets/{widget_id}/edit
func (v WidgetsResource) Edit(c buffalo.Context) error {
	// Get the DB connection from the context
	tx, ok := c.Value("tx").(*pop.Connection)
	if !ok {
		return fmt.Errorf("no transaction found")
	}

	// Allocate an empty Widget
	widget := &models.Widget{}

	if err := tx.Find(widget, c.Param("widget_id")); err != nil {
		return c.Error(http.StatusNotFound, err)
	}

	c.Set("widget", widget)
	return c.Render(http.StatusOK, r.HTML("widgets/edit.plush.html"))
}

// Update changes a Widget in the DB. This function is mapped to
// the path PUT /widgets/{widget_id}
func (v WidgetsResource) Update(c buffalo.Context) error {
	// Get the DB connection from the context
	tx, ok := c.Value("tx").(*pop.Connection)
	if !ok {
		return fmt.Errorf("no transaction found")
	}

	// Allocate an empty Widget
	widget := &models.Widget{}

	if err := tx.Find(widget, c.Param("widget_id")); err != nil {
		return c.Error(http.StatusNotFound, err)
	}

	// Bind Widget to the html form elements
	if err := c.Bind(widget); err != nil {
		return err
	}

	verrs, err := tx.ValidateAndUpdate(widget)
	if err != nil {
		return err
	}

	if verrs.HasAny() {
		return responder.Wants("html", func(c buffalo.Context) error {
			// Make the errors available inside the html template
			c.Set("errors", verrs)

			// Render again the edit.html template that the user can
			// correct the input.
			c.Set("widget", widget)

			return c.Render(http.StatusUnprocessableEntity, r.HTML("widgets/edit.plush.html"))
		}).Wants("json", func(c buffalo.Context) error {
			return c.Render(http.StatusUnprocessableEntity, r.JSON(verrs))
		}).Wants("xml", func(c buffalo.Context) error {
			return c.Render(http.StatusUnprocessableEntity, r.XML(verrs))
		}).Respond(c)
	}

	return responder.Wants("html", func(c buffalo.Context) error {
		// If there are no errors set a success message
		c.Flash().Add("success", T.Translate(c, "widget.updated.success"))

		// and redirect to the show page
		return c.Redirect(http.StatusSeeOther, "/widgets/%v", widget.ID)
	}).Wants("json", func(c buffalo.Context) error {
		return c.Render(http.StatusOK, r.JSON(widget))
	}).Wants("xml", func(c buffalo.Context) error {
		return c.Render(http.StatusOK, r.XML(widget))
	}).Respond(c)
}

// Destroy deletes a Widget from the DB. This function is mapped
// to the path DELETE /widgets/{widget_id}
func (v WidgetsResource) Destroy(c buffalo.Context) error {
	// Get the DB connection from the context
	tx, ok := c.Value("tx").(*pop.Connection)
	if !ok {
		return fmt.Errorf("no transaction found")
	}

	// Allocate an empty Widget
	widget := &models.Widget{}

	// To find the Widget the parameter widget_id is used.
	if err := tx.Find(widget, c.Param("widget_id")); err != nil {
		return c.Error(http.StatusNotFound, err)
	}

	if err := tx.Destroy(widget); err != nil {
		return err
	}

	return responder.Wants("html", func(c buffalo.Context) error {
		// If there are no errors set a flash message
		c.Flash().Add("success", T.Translate(c, "widget.destroyed.success"))

		// Redirect to the index page
		return c.Redirect(http.StatusSeeOther, "/widgets")
	}).Wants("json", func(c buffalo.Context) error {
		return c.Render(http.StatusOK, r.JSON(widget))
	}).Wants("xml", func(c buffalo.Context) error {
		return c.Render(http.StatusOK, r.XML(widget))
	}).Respond(c)
}

package actions

func (as *ActionSuite) Test_WidgetsResource_List() {
	as.Fail("Not Implemented!")
}

func (as *ActionSuite) Test_WidgetsResource_Show() {
	as.Fail("Not Implemented!")
}

func (as *ActionSuite) Test_WidgetsResource_Create() {
	as.Fail("Not Implemented!")
}

func (as *ActionSuite) Test_WidgetsResource_Update() {
	as.Fail("Not Implemented!")
}

func (as *ActionSuite) Test_WidgetsResource_Destroy() {
	as.Fail("Not Implemented!")
}

func (as *ActionSuite) Test_WidgetsResource_New() {
	as.Fail("Not Implemented!")
}

func (as *ActionSuite) Test_WidgetsResource_Edit() {
	as.Fail("Not Implemented!")
}

- id: "widget.created.success"
  translation: "Widget was successfully created."
- id: "widget.updated.success"
  translation: "Widget was successfully updated."
- id: "widget.destroyed.success"
  translation: "Widget was successfully destroyed."

create_table("widgets") {
	t.Column("id", "uuid", {primary: true})
	t.Column("title", "string", {})
	t.Column("description", "text", {null: true})
	t.Timestamps()
}

drop_table("widgets")

package models

import (
	"encoding/json"
	"time"

	"github.com/gobuffalo/nulls"
	"github.com/gobuffalo/pop/v6"
	"github.com/gobuffalo/validate/v3"
	"github.com/gobuffalo/validate/v3/validators"
	"github.com/gofrs/uuid"
)

// Widget is used by pop to map your widgets database table to your go code.
type Widget struct {
	ID          uuid.UUID    `json:"id" db:"id"`
	Title       string       `json:"title" db:"title"`
	Description nulls.String `json:"description" db:"description"`
	CreatedAt   time.Time    `json:"created_at" db:"created_at"`
	UpdatedAt   time.Time    `json:"updated_at" db:"updated_at"`
}

// String is not required by pop and may be deleted
func (w Widget) String() string {
	jw, _ := json.Marshal(w)
	return string(jw)
}

// Widgets is not required by pop and may be deleted
type Widgets []Widget

// String is not required by pop and may be deleted
func (w Widgets) String() string {
	jw, _ := json.Marshal(w)
	return string(jw)
}

// Validate gets run every time you call a "pop.Validate*" (pop.ValidateAndSave, pop.ValidateAndCreate, pop.ValidateAndUpdate) method.
// This method is not required and may be deleted.
func (w *Widget) Validate(tx *pop.Connection) (*validate.Errors, error) {
	return validate.Validate(
		&validators.StringIsPresent{Field: w.Title, Name: "Title"},
	), nil
}

// ValidateCreate gets run every time you call "pop.ValidateAndCreate" method.
// This method is not required and may be deleted.
func (w *Widget) ValidateCreate(tx *pop.Connection) (*validate.Errors, error) {
	return validate.NewErrors(), nil
}

// ValidateUpdate gets run every time you call "pop.ValidateAndUpdate" method.
// This method is not required and may be deleted.
func (w *Widget) ValidateUpdate(tx *pop.Connection) (*validate.Errors, error) {
	return validate.NewErrors(), nil
}

package models

func (ms *ModelSuite) Test_Widget() {
	ms.Fail("This test needs to be implemented!")
}

<%= f.InputTag("Title") %>
<%= f.TextAreaTag("Description", {rows: 10}) %>
<button class="btn btn-success" role="submit">Save</button>

<div class="py-4 mb-2">
  <h3 class="d-inline-block">Edit Widget</h3>
</div>

<%= formFor(widget, {action: widgetPath({ widget_id: widget.ID }), method: "PUT"}) { %>
  <%= partial("widgets/form.html") %>
  <%= linkTo(widgetPath({ widget_id: widget.ID }), {class: "btn btn-warning", "data-confirm": "Are you sure?", body: "Cancel"}) %>
<% } %>

<div class="py-4 mb-2">
  <h3 class="d-inline-block">Widgets</h3>
  <div class="float-end">
    <%= linkTo(newWidgetsPath(), {class: "btn btn-primary"}) { %>
      Create New Widget
    <% } %>
  </div>
</div>

<table class="table table-hover table-bordered">
  <thead class="thead-light">
    <th>Title</th>
    <th>&nbsp;</th>
  </thead>
  <tbody>
    <%= for (widget) in widgets { %>
      <tr>
        <td class="align-middle"><%= widget.Title %></td>
        <td>
          <div class="float-end">
            <%= linkTo(widgetPath({ widget_id: widget.ID }), {class: "btn btn-info", body: "View"}) %>
            <%= linkTo(editWidgetPath({ widget_id: widget.ID }), {class: "btn btn-warning", body: "Edit"}) %>
            <%= linkTo(widgetPath({ widget_id: widget.ID }), {class: "btn btn-danger", "data-method": "DELETE", "data-confirm": "Are you sure?", body: "Destroy"}) %>
          </div>
        </td>
      </tr>
    <% } %>
  </tbody>
</table>

<div class="text-center">
  <%= paginator(pagination) %>
</div>

<div class="py-4 mb-2">
  <h3 class="d-inline-block">New Widget</h3>
</div>

<%= formFor(widget, {action: widgetsPath(), method: "POST"}) { %>
  <%= partial("widgets/form.html") %>
  <%= linkTo(widgetsPath(), {class: "btn btn-warning", "data-confirm": "Are you sure?", body: "Cancel"}) %>
<% } %>

<div class="py-4 mb-2">
  <h3 class="d-inline-block">Widget Details</h3>

  <div class="float-end">
    <%= linkTo(widgetsPath(), {class: "btn btn-info"}) { %>
      Back to all Widgets
    <% } %>
    <%= linkTo(editWidgetPath({ widget_id: widget.ID }), {class: "btn btn-warning", body: "Edit"}) %>
    <%= linkTo(widgetPath({ widget_id: widget.ID }), {class: "btn btn-danger", "data-method": "DELETE", "data-confirm": "Are you sure?", body: "Destroy"}) %>
  </div>
</div>



<ul class="list-group mb-2 ">


  <li class="list-group-item pb-1">
    <label class="small d-block">Title</label>
    <p class="d-inline-block"><%= widget.Title %></p>
  </li>



  <li class="list-group-item pb-1">
    <label class="small d-block">Description</label>
    <p class="d-inline-block"><%= widget.Description %></p>
  </li>


</ul>

Eliminando recursos

Puedes eliminar los archivos generados por este generador ejecutando:

$ buffalo destroy resource users

Este comando te preguntará qué archivos quiere eliminar, puede responder a cada una de las preguntas con y/n o puede pasar el flag -y al comando de la siguiente manera:

$ buffalo destroy resource users -y

O en forma abreviada:

$ buffalo d r users -y

Anidación de Recursos

Para simplificar la creación de jerarquías de recursos, Buffalo admite la anidación de recursos.

type WidgetsResource struct {
	buffalo.Resource
}

type ImagesResource struct {
  buffalo.Resource
}

w := app.Resource("/widgets", WidgetsResource{})
w.Resource("/images", ImagesResource{})

Esto da como resultado las siguientes rutas:

$ buffalo routes

METHOD | HOST                  | PATH                                         | ALIASES | NAME                | HANDLER
------ | ----                  | ----                                         | ------- | ----                | -------
GET    | http://127.0.0.1:3000 | /                                            |         | rootPath            | coke/actions.HomeHandler
GET    | http://127.0.0.1:3000 | /widgets/                                    |         | widgetsPath         | coke/actions.WidgetsResource.List
POST   | http://127.0.0.1:3000 | /widgets/                                    |         | widgetsPath         | coke/actions.WidgetsResource.Create
GET    | http://127.0.0.1:3000 | /widgets/new/                                |         | newWidgetsPath      | coke/actions.WidgetsResource.New
GET    | http://127.0.0.1:3000 | /widgets/{widget_id}/                        |         | widgetPath          | coke/actions.WidgetsResource.Show
PUT    | http://127.0.0.1:3000 | /widgets/{widget_id}/                        |         | widgetPath          | coke/actions.WidgetsResource.Update
DELETE | http://127.0.0.1:3000 | /widgets/{widget_id}/                        |         | widgetPath          | coke/actions.WidgetsResource.Destroy
GET    | http://127.0.0.1:3000 | /widgets/{widget_id}/edit/                   |         | editWidgetPath      | coke/actions.WidgetsResource.Edit
GET    | http://127.0.0.1:3000 | /widgets/{widget_id}/images/                 |         | widgetImagesPath    | coke/actions.ImagesResource.List
POST   | http://127.0.0.1:3000 | /widgets/{widget_id}/images/                 |         | widgetImagesPath    | coke/actions.ImagesResource.Create
GET    | http://127.0.0.1:3000 | /widgets/{widget_id}/images/new/             |         | newWidgetImagesPath | coke/actions.ImagesResource.New
GET    | http://127.0.0.1:3000 | /widgets/{widget_id}/images/{image_id}/      |         | widgetImagePath     | coke/actions.ImagesResource.Show
PUT    | http://127.0.0.1:3000 | /widgets/{widget_id}/images/{image_id}/      |         | widgetImagePath     | coke/actions.ImagesResource.Update
DELETE | http://127.0.0.1:3000 | /widgets/{widget_id}/images/{image_id}/      |         | widgetImagePath     | coke/actions.ImagesResource.Destroy
GET    | http://127.0.0.1:3000 | /widgets/{widget_id}/images/{image_id}/edit/ |         | editWidgetImagePath | coke/actions.ImagesResource.Edit

buffalo.BaseResource

Cuando se genera un recurso, éste tiene incorporado el buffalo.BaseResource.

type Widget struct {
  buffalo.BaseResource
}

El buffalo.BaseResource tiene implementaciones básicas para todos los métodos requeridos por buffalo.Resource. Todos estos métodos retornan un 404 por defecto.

// Edit default implementation. Returns a 404
func (v BaseResource) Edit(c Context) error {
  return c.Error(http.StatusNotFound, errors.New("resource not implemented"))
}

Como empezar

Gestión de Peticiones

Frontend

Base de datos

Guías

Deploy

Gestión de Peticiones

Recursos

Uso de Recursos

Métodos de Recursos Opcionales

Generando Recursos

Ejemplo de Generación de Recursos

Eliminando recursos

Anidación de Recursos

buffalo.BaseResource

Video de presentación

Contenido relacionado

Siguientes pasos