FunctionMaps within a Controller function about render HOT 11 CLOSED

m.Use(render.Renderer(render.Options{
    Directory:       "templates",
    Layout:          "layout",
    Extensions:      []string{".tmpl", ".html"},
    Delims:          render.Delims{"{{", "}}"},
    Charset:         "UTF-8",
    IndentJSON:      true,
    HTMLContentType: "text/html",
    Funcs: []template.FuncMap{
        {
            blogCtlr.FuncMaps
        }
    }
}))

var (
    FuncMaps = template.FuncMap{
        "formatDate": func(dt time.Time) string {
            tlayout := "01/02/2006 3:04 PM"
            Local, _ := time.LoadLocation("US/Central")
            return dt.In(Local).Format(tlayout)
        },
        "showCommentsLink": func(c blog.Comments) bool {
            return len(c.Approved) > 0 || len(c.Unapproved) > 0
        },
    }
)

func EditPost(ctx *web.Context, r render.Render) {
    str_id := ctx.FormValue("postid")
    postID, err := strconv.Atoi(str_id)
    if err != nil {
        ctx.Redirect(http.StatusFound, "/blog")
        return
    }

    var post blog.Post

    if postID > 0 {
        post = blog.Post{ID: postID}
        if err := post.Get(); err != nil {
            ctx.Redirect(http.StatusFound, "/blog")
            return
        }
    } else {
        post = blog.Post{ID: 0}
    }

    ...
    FuncMap["isUser"] = func(uid int) bool {
        return uid == post.UserID
    }

    FuncMap["hasCategory"] = func(cid int) bool {
        for _, cat := range post.Categories {
            if cid == cat.ID {
                return true
            }
        }
        return false
    }
    ...
    r.HTML(http.StatusFound, "blog/edit.html", post)
}

...
<div class="form-group">
    <label for="userid" class="col-lg-2 control-label">Author</label>
    <div class="col-lg-10">
        <select name="userid" id="userid">
            <option value="0">Choose an Author</option>
            {{range .AllUsers}}
            <option value="{{.ID}}" {{if isUser .ID }}selected="selected"{{end}}>{{.Fname}} {{.Lname}}</option>
            {{end}}
        </select>
    </div>
</div>
...

func Index(rw http.ResponseWriter, r *http.Request, ren render.Render) {
    data := make(map[string]interface{})

    data["PageTitle"] = "Blog"
    data["Categories"], _ = blog.BlogCategory{}.GetAll()
    data["Posts"], _ = blog.Post{}.GetAll()
    data["Comments"], _ = blog.Comment{}.GetAll()

    data["formatDate"] = func(dt time.Time) string {
        tlayout := "01/02/2006 3:04 PM"
        Local, _ := time.LoadLocation("US/Central")
        return dt.In(Local).Format(tlayout)
    }

    data["showCommentsLink"] = func(c blog.Comments) bool {
        return len(c.Approved) > 0 || len(c.Unapproved) > 0
    }

    ren.HTML(http.StatusOK, "blog/index", data)
}

<tbody>
    {{range $post := .Posts}}
    <tr>
        <td>{{$post.Title}}</td>
        <td>{{.formatDate $post.Created}}</td>
        <td>{{if $post.Published.IsZero }}Not Published {{else}} {{.formatDate $post.Published}}{{end}}</td>
        <td>{{len .Comments.Approved}}</td>
        <td>{{len .Comments.Unapproved}}</td>
        <td>
            <div class="btn-group">
                <button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">
                Action
                <span class="caret"></span>
                </button>
                <ul class="dropdown-menu" role="menu">
                    <li><a href="/blog/posts/{{$post.ID}}">Edit</a></li>
                    <li><a href="#" class="delete" data-id="{{$post.ID}}">Delete</a></li>
                    {{if .showCommentsLink $post.Comments}}
                    <li><a href="/blog/postcomments/{{$post.ID}}">View Comments</a></li>
                    {{end}}
                </ul>
            </div>
        </td>
    </tr>
    {{end}}
</tbody>