first add object "article" data to parameters like this:
@app.route('/update_article/<id>', methods=['GET', 'POST'])
@login_required
def update_article(id):
categorias = Category.query.all()
titulo = trad_art["Edit Article"]["es"]
article = Article.query.get(id)
form = ArticleForm(obj=article)
if form.validate_on_submit():
form.populate_obj(article)
db.session.commit()
return redirect(url_for('update_images', id=id)) # or your favorite redirect
return render_template(
"add_article.html",
article=article,
form=form,
titulo=titulo,
categorias=categorias,
)
our form "ArticleForm" is used for adding or update Article like this:
class ArticleForm(FlaskForm):
name = StringField(trad_art['name']["es"], render_kw={"placeholder": "Nombre del producto"}, validators=[
DataRequired(), Length(max=64)])
category = StringField(trad_art['Category']["es"], validators=[
DataRequired(), Length(max=64)])
quantity = IntegerField(trad_art['Quantity']["es"])
description = TextAreaField(trad_art['Description']["es"], render_kw={"rows": 10, "cols": 30}, validators=[
DataRequired()])
is_vintage = BooleanField(trad_art['Is Vintage']["es"])
is_antic = BooleanField(trad_art['Is Antic']["es"])
as_new = BooleanField(trad_art['As New']["es"])
submit = SubmitField(trad_art['Save Article']["es"], render_kw={
"class": "btn btn-primary"})
And finally in our template make condition "if object exist" like this:
<form action="" method="post" novalidate>
{{ form.hidden_tag() }}
<div class="form-group">
{{ form.name.label }}<br>
{{ form.name }}<br>
{% for error in form.name.errors %}
<span style="color: red;">{{ error }}</span>
{% endfor %}
</div>
<div class="form-group">
{{ form.category.label }}<br>
<select id="get_category"
value =""
name="category" class="form-control" >
<option value="Todos">Todos</option>
{% for categoria in categorias %}
<option
value="{{ categoria.name }}"
{% if article.category == categoria.name %}selected{% endif %}
>{{ categoria.name }}</option>
{% endfor %}
</select>
<br>
{% for error in form.category.errors %}
<span style="color: red;">{{ error }}</span>
{% endfor %}
</div>
<div class="form-group">
{{ form.quantity.label }}<br>
{{ form.quantity }}<br>
{% for error in form.quantity.errors %}
<span style="color: red;">{{ error }}</span>
{% endfor %}
</div>
<div class="form-group">
{{ form.description.label }}<br>
{{ form.description }}<br>
{% for error in form.description.errors %}
<span style="color: red;">{{ error }}</span>
{% endfor %}
</div>
<div class="form-group">
{{ form.is_vintage() }}
{{ form.is_vintage.label }}
</div>
<div class="form-group">
{{ form.is_antic() }}
{{ form.is_antic.label }}
</div>
<div class="form-group">
{{ form.as_new() }}
{{ form.as_new.label }}
</div>
<div class="form-group">
{{ form.submit() }}
</div>
</form>
We change our select section to:
<div class="form-group">
{{ form.category.label }}<br>
<select id="get_category"
value =""
name="category" class="form-control" >
<option value="Todos">Todos</option>
{% for categoria in categorias %}
<option
value="{{ categoria.name }}"
{% if article.category == categoria.name %}selected{% endif %}
>{{ categoria.name }}</option>
{% endfor %}
</select>
<br>
{% for error in form.category.errors %}
<span style="color: red;">{{ error }}</span>
{% endfor %}
</div>
And finally not forgot to add "article=None" in parameters of add_article view like :
@app.route('/add_article', methods=['GET', 'POST'])
@login_required
def add_article():
categorias = Category.query.all()
titulo = trad_art["Edit Article"]["es"]
form = ArticleForm()
if form.validate_on_submit():
name = form.name.data
category = form.category.data
quantity = form.quantity.data
description = form.description.data
is_vintage = form.is_vintage.data
is_antic = form.is_antic.data
as_new = form.as_new.data
date_register = datetime.datetime.now()
galery = '[]'
article = User.query.filter_by(name=name).first()
if article: # if a article is found, we want to redirect back to signup page so user can try again
# print('Article name already exists')
msg01 = trad_art["Article already exists"]["es"]
flash(msg01)
return redirect(url_for('add_article'))
# Creamos el articulo y lo guardamos
# create a new article with the form data. and save it...
new_article = Article(
name=name,
category=category,
quantity=int(quantity),
description=description,
is_vintage=is_vintage,
is_antic=is_antic,
as_new=as_new,
date_register=date_register,
galery=galery)
# add the new user to the database
db.session.add(new_article)
db.session.commit()
return redirect(url_for('update_images', id=new_article.id))
return render_template(
"add_article.html",
article=None,
form=form,
titulo=titulo,
categorias=categorias,
)
