Elixir 对Lxphnx.ArticleController.create的请求不正确，没有匹配的操作子句来处理请求

我可以做一个GET请求，但我似乎无法让POST请求工作

这是我的路线

article_path  GET     /api/articles      Lxphnx.ArticleController :index
article_path  GET     /api/articles/:id  Lxphnx.ArticleController :show
article_path  POST    /api/articles      Lxphnx.ArticleController :create
article_path  PATCH   /api/articles/:id  Lxphnx.ArticleController :update
              PUT     /api/articles/:id  Lxphnx.ArticleController :update
article_path  DELETE  /api/articles/:id  Lxphnx.ArticleController :delete

除了使用mix phoenix.gen.json之外，我什么都没碰过。这个项目只是一个API，所以我在创建项目时也使用了——没有早午餐——没有html

控制器：

defmodule Lxphnx.ArticleController do
  use Lxphnx.Web, :controller

  alias Lxphnx.Article

  def index(conn, _params) do
    articles = Repo.all(Article)
    render(conn, "index.json", articles: articles)
  end

  def create(conn, %{"article" => article_params}) do
    changeset = Article.changeset(%Article{}, article_params)

    case Repo.insert(changeset) do
      {:ok, article} ->
        conn
        |> put_status(:created)
        |> put_resp_header("location", article_path(conn, :show, article))
        |> render("show.json", article: article)
      {:error, changeset} ->
        conn
        |> put_status(:unprocessable_entity)
        |> render(Lxphnx.ChangesetView, "error.json", changeset: changeset)
    end
  end

  def show(conn, %{"id" => id}) do
    article = Repo.get!(Article, id)
    render(conn, "show.json", article: article)
  end

  def update(conn, %{"id" => id, "article" => article_params}) do
    article = Repo.get!(Article, id)
    changeset = Article.changeset(article, article_params)

    case Repo.update(changeset) do
      {:ok, article} ->
        render(conn, "show.json", article: article)
      {:error, changeset} ->
        conn
        |> put_status(:unprocessable_entity)
        |> render(Lxphnx.ChangesetView, "error.json", changeset: changeset)
    end
  end

  def delete(conn, %{"id" => id}) do
    article = Repo.get!(Article, id)

    # Here we use delete! (with a bang) because we expect
    # it to always work (and if it does not, it will raise).
    Repo.delete!(article)

    send_resp(conn, :no_content, "")
  end
end

defmodule Lxphnx.ArticleView do
  use Lxphnx.Web, :view

  def render("index.json", %{articles: articles}) do
    %{data: render_many(articles, Lxphnx.ArticleView, "article.json")}
  end

  def render("show.json", %{article: article}) do
    %{data: render_one(article, Lxphnx.ArticleView, "article.json")}
  end

  def render("article.json", %{article: article}) do
    %{id: article.id,
      title: article.title,
      body: article.body,
      type: article.type}
  end
end

路由器：

defmodule Lxphnx.ArticleController do
  use Lxphnx.Web, :controller

  alias Lxphnx.Article

  def index(conn, _params) do
    articles = Repo.all(Article)
    render(conn, "index.json", articles: articles)
  end

  def create(conn, %{"article" => article_params}) do
    changeset = Article.changeset(%Article{}, article_params)

    case Repo.insert(changeset) do
      {:ok, article} ->
        conn
        |> put_status(:created)
        |> put_resp_header("location", article_path(conn, :show, article))
        |> render("show.json", article: article)
      {:error, changeset} ->
        conn
        |> put_status(:unprocessable_entity)
        |> render(Lxphnx.ChangesetView, "error.json", changeset: changeset)
    end
  end

  def show(conn, %{"id" => id}) do
    article = Repo.get!(Article, id)
    render(conn, "show.json", article: article)
  end

  def update(conn, %{"id" => id, "article" => article_params}) do
    article = Repo.get!(Article, id)
    changeset = Article.changeset(article, article_params)

    case Repo.update(changeset) do
      {:ok, article} ->
        render(conn, "show.json", article: article)
      {:error, changeset} ->
        conn
        |> put_status(:unprocessable_entity)
        |> render(Lxphnx.ChangesetView, "error.json", changeset: changeset)
    end
  end

  def delete(conn, %{"id" => id}) do
    article = Repo.get!(Article, id)

    # Here we use delete! (with a bang) because we expect
    # it to always work (and if it does not, it will raise).
    Repo.delete!(article)

    send_resp(conn, :no_content, "")
  end
end

defmodule Lxphnx.ArticleView do
  use Lxphnx.Web, :view

  def render("index.json", %{articles: articles}) do
    %{data: render_many(articles, Lxphnx.ArticleView, "article.json")}
  end

  def render("show.json", %{article: article}) do
    %{data: render_one(article, Lxphnx.ArticleView, "article.json")}
  end

  def render("article.json", %{article: article}) do
    %{id: article.id,
      title: article.title,
      body: article.body,
      type: article.type}
  end
end

deffmodule Lxphnx.Router do 使用Lxphnx.Web，：路由器

 pipeline :api do
   plug :accepts, ["json"]
 end

 scope "/api", Lxphnx do
   pipe_through :api
   resources "/articles", ArticleController, except: [:new, :edit]
 end
end

查看：

defmodule Lxphnx.ArticleController do
  use Lxphnx.Web, :controller

  alias Lxphnx.Article

  def index(conn, _params) do
    articles = Repo.all(Article)
    render(conn, "index.json", articles: articles)
  end

  def create(conn, %{"article" => article_params}) do
    changeset = Article.changeset(%Article{}, article_params)

    case Repo.insert(changeset) do
      {:ok, article} ->
        conn
        |> put_status(:created)
        |> put_resp_header("location", article_path(conn, :show, article))
        |> render("show.json", article: article)
      {:error, changeset} ->
        conn
        |> put_status(:unprocessable_entity)
        |> render(Lxphnx.ChangesetView, "error.json", changeset: changeset)
    end
  end

  def show(conn, %{"id" => id}) do
    article = Repo.get!(Article, id)
    render(conn, "show.json", article: article)
  end

  def update(conn, %{"id" => id, "article" => article_params}) do
    article = Repo.get!(Article, id)
    changeset = Article.changeset(article, article_params)

    case Repo.update(changeset) do
      {:ok, article} ->
        render(conn, "show.json", article: article)
      {:error, changeset} ->
        conn
        |> put_status(:unprocessable_entity)
        |> render(Lxphnx.ChangesetView, "error.json", changeset: changeset)
    end
  end

  def delete(conn, %{"id" => id}) do
    article = Repo.get!(Article, id)

    # Here we use delete! (with a bang) because we expect
    # it to always work (and if it does not, it will raise).
    Repo.delete!(article)

    send_resp(conn, :no_content, "")
  end
end

defmodule Lxphnx.ArticleView do
  use Lxphnx.Web, :view

  def render("index.json", %{articles: articles}) do
    %{data: render_many(articles, Lxphnx.ArticleView, "article.json")}
  end

  def render("show.json", %{article: article}) do
    %{data: render_one(article, Lxphnx.ArticleView, "article.json")}
  end

  def render("article.json", %{article: article}) do
    %{id: article.id,
      title: article.title,
      body: article.body,
      type: article.type}
  end
end

哦，我也试过这个

---

我使用的是cURL，我没有忘记它是一个application/json。这是我的curl请求：

curl-X POST-d'{“id”：1，“title”：“a title”，“body”：“a body”，“type:1”}'-o log.txt localhost:4000/api/articles

如果我使用postman，我会得到相同的结果。

为了使函数子句匹配，需要在curl请求中指定“article”：

curl -X POST -d '{"article": {"id":1, "title":"a title", "body":"a body", "type:1"}}' -o log.txt localhost:4000/api/articles

如果不希望对象中存在此顶级关键点，请更改：

def create(conn, %{"article" => article_params}) do
  changeset = Article.changeset(%Article{}, article_params)

致：

---

为了使function子句匹配，您需要在curl请求中指定“article”：

curl -X POST -d '{"article": {"id":1, "title":"a title", "body":"a body", "type:1"}}' -o log.txt localhost:4000/api/articles

如果不希望对象中存在此顶级关键点，请更改：

def create(conn, %{"article" => article_params}) do
  changeset = Article.changeset(%Article{}, article_params)

致：

---

您正在尝试模式匹配“article”，但遗憾的是您没有在有效负载中设置article；）@JeremieGes抱歉，您能详细说明一下您的意思吗？您正在尝试模式匹配“文章”，但遗憾的是您没有在有效负载中设置文章；）@JeremieGes对不起，你能详细解释一下你的意思吗？我正要自己写答案。谢谢：）我正要自己写答案。谢谢：）