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Python

Posted by sepehr akbarzadeh
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sepehr akbarzadeh
Python Web Development Techdegree Student 1,762 Points

how to change subgroup when group selection field changed in Flask Forms?

I have products table with categories in SQL Alchemy ORM. So, I want a solution for this problem:

when I change Group Field, how to reload subgroup fields in HTML with Ajax in a dynamically way (Flask). This is My WTF From: how can I fill parent_id dynamically, without hardcode and system can find user now want these subgroups. "

parent_id = 1 ==> is Wrong"

...
    group = QuerySelectField(query_factory=lambda: ProductGroup.query.filter_by(parent_id = None).all(),
                            get_label="id")
    subgroup = QuerySelectField(query_factory=lambda: ProductGroup.query.filter_by(parent_id = 1).all(),
                            get_label="id")

This is HTML Loader:

                        <div class="form-group">
                          {{ form.group.label }}
                          {{ form.group(class_= "form-control") }}
                        </div>
                        <div class="form-group">
                          {{ form.subgroup.label }}
                          {{ form.subgroup(class_= "form-control") }}
                        </div>