models.py

from django.db import models

from wagtail.core.models import Page
from wagtail.core.fields import RichTextField
from wagtail.admin.edit_handlers import FieldPanel
from wagtail.search import index
from wagtail.images.edit_handlers import ImageChooserPanel


class TallerIndexPage(Page):
    template = "talleres/talleres_page.html"

    intro = RichTextField(blank=True)

    content_panels = Page.content_panels + [
        FieldPanel('intro', classname="full")
    ]


class Taller(Page):
    template = "talleres/taller_single_page.html"

    fechapub = models.DateField("Fecha Inicio Taller", null=True, blank=True)

    lugar_taller = models.CharField(max_length=150, null=True, blank=True, verbose_name="Lugar donde se realizará el Taller")

    descripcion = RichTextField(blank=False, null = False, verbose_name="Descripción del Taller")
    
    contenido = RichTextField(blank=True, null = True, verbose_name="Todo el contenido extra del taller",  default="<p>some HTML here</p>")

    imagen_taller = models.ForeignKey(
        "wagtailimages.Image",
        null=True,
        blank=True,
        on_delete=models.SET_NULL,
        related_name="+",
    )

    search_fields = Page.search_fields + [
        index.SearchField(

            'descripcion'),
    ]

    content_panels = Page.content_panels + [


        FieldPanel('fechapub'),
        FieldPanel('lugar_taller'),
        FieldPanel('descripcion'),
        FieldPanel('contenido'),

        ImageChooserPanel('imagen_taller'),
    ]

wagtail_template

{% extends "base.html" %}
{% block content %}
{% load static %}
{% load wagtailcore_tags wagtailimages_tags %}


 
  <div class="container titulo-talleres">
            <h2>{{ page.title }}</h2>
      </div>
      <ul class="gridt">
        {% for post in page.get_children %}

        <li class="grid-item exposiciones">
          <article class="post-blogpage">
            <div class="image-blogpage">
               {% image post.imagen_taller original class="img-fluid" %}
            </div>
            <h2>
              {{ post.title }}
            </h2>
            <div class="date">{{post.first_published_at}}</div>
            <div class="rich-text">
              <p>
                 {{ post.descripcion|richtext }}
              </p>
            </div>
            <div class="bottom-post">
              <div class="datos-post">
                <h3>inicio:{{ post.fechapub }}</h3>
                <h3>Lugar:{{post.lugar_taller}}</h3>
              </div>
              <div class="leer-mas-blogpage">
                <a href="single-post.html">leer más</a>
              </div>
             
            
            </div>
          </article>
        </li>
    
       {% endfor %}

      </ul>

{% endblock %}