Help with "Related Field got invalid lookup: contains"

So im trying to build this clothing website and im now in the part which an html page displays all the shoes, for this i have a field called category, however, my problem is that whenever I use (category__contains=“Shoes”) it shows the “Related Field got invalid lookup: contains” error.

To clarify the function thats in charge of displaying the shoes is the one called shoes.

Here is my code:

from django.shortcuts import render
from .models import ClothingItem,Categorie,SubCategorie

# Create your views here.

def home(request):
    return render(request,'item_type/home.html',{})

def show_category(request, category_id):
    category = Categorie.objects.get(id=category_id)
    sub_category = SubCategorie.objects.all()
    context = {'category':category,'sub_category':sub_category}
    return render(request, 'item_type/show_category.html',context)

def clothing(request):
    sub_category = SubCategorie.objects.all()
    context = {'sub_category':sub_category}
    return render(request,'item_type/clothing.html',context )

def show_subcategory(request, subcategory_id):
    sub_category = SubCategorie.objects.get(id=subcategory_id)
    item_list = ClothingItem.objects.filter(sub_category=sub_category)
    context = {'sub_category':sub_category,'item_list':item_list}
    return render(request, 'item_type/show_subcategory.html',context)

def all_items(request):
    items_list = ClothingItem.objects.all()
    return render(request, 'item_type/clothing_list.html',{'items_list':items_list})

def shoes(request):
    shoe_list = ClothingItem.objects.filter(category__contains='Shoes')
    return render(request, 'item_type/shoes.html',{'shoe_list':shoe_list})

def category(request):
    sub_category = SubCategorie.objects.all()
    category_list = Categorie.objects.all()
    return render(request, 'item_type/categories.html',{'category_list':category_list,'sub_category':sub_category})

def search_item(request):
    if request.method == "POST":
        searched = request.POST['searched']
        items = ClothingItem.objects.filter(name__contains=searched)
        return render(request, 'item_type/search_item.html',{'searched':searched,'items':items})
        return render(request, 'item_type/search_item.html',{})

Here is my code (please ignore the spelling of category and sub-category):

from django.db import models
from django.urls import reverse
import uuid

# Create your models here.
class ClothingItem(models.Model):
    category = models.ForeignKey('Categorie',null=True,on_delete=models.CASCADE)
    sub_category = models.ForeignKey('SubCategorie',null=True,blank=True,on_delete=models.CASCADE)
    name = models.CharField( max_length=50)
    brand = models.ForeignKey('Brand',null=True,on_delete=models.CASCADE)
    description = models.TextField(max_length=1000,blank=True)
    item_image = models.ImageField(null=True,blank=True, upload_to="images/")
    sale = models.BooleanField('Sale', null=False,blank=False)

    def __str__(self):

class Categorie(models.Model):
    category = models.CharField(max_length=100)
    def __str__(self):
        return self.category
class SubCategorie(models.Model):
    sub_category = models.CharField('Clothing Type',max_length=100)
    def __str__(self):
        return self.sub_category
class Sale(models.Model):
    onSale = models.BooleanField(null=False, blank=False)
    def __str__(self):
                return self.onSale

class Brand(models.Model):
        brand_name = models.CharField(max_length=100)
        class Meta:
            ordering = ['brand_name']
        def get_absolute_url(self):
            return reverse("brand_detail", kwargs={"pk":})
        def __str__(self):
            return self.brand_name

Here is the html page which should bring up the shoes:

{% extends 'item_type/base.html' %}

{% block content %}
    <h1>List of shoes</h1>
        {% for i in shoe_list %}
            <div class="card">
                <div class="card-header">
                <div class="card-body">
                <p class="card-text"> <strong> Brand: {{i.brand}} </strong>
                    {% if i.item_image %}   
                        <img src="{{i.item_image.url}}">
                    {% endif %}
        {% endfor %}
{% endblock  %}

You have:


So the category field in ClothingItem is the foreign key to the Categorie object. It’s the numerical field referencing the id field in Categorie. What you’re really trying to compare here is the value of the category field within Categorie, which means your filter clause would be:
The first “category” is a reference to the model, the second “category” is the reference to the field within the model.