[英]Multiple forms in a single page using flask and WTForms in which one form link to another
這是現在的樣子:
這就是我需要的
(粗體字是有效的部分)
我的代碼:
主功能
@app.route("/searchArea", methods=['GET', 'POST'])
@login_required
def searchArea():
if current_user.is_authenticated and verifyIdentity(current_user.username)==True:
form1 = FindArea()
form2 = SelectUser()
if form1.submit1.data and form1.validate():
allMatch = User.query.filter_by(area=form1.area1.data).all()
if(allMatch == []):
flash('area code does not exist', 'danger')
return redirect(url_for('searchArea'))
if form2.submit2.data and form2.validate(): #######
user_select = int(form2.area.data)
if(user_select>0 or user_select<=len(allMatch)):
user= allMatch[user_select-1]
author_name = user.username
posts = Post.query.filter_by(author=author_name).all()
emty_list = []
while(len(posts)!= emty_list):
db.session.delete(posts[0])
db.session.delete(user)
db.session.commit()
return redirect(url_for('home'))
flash('change have been made successfully', 'success')
#return redirect(url_for('deleteUser',user=allMatch[user_select]))
else:
return redirect(url_for('searchArea'))
flash('check your entry', 'danger')#######
return render_template('print_area.html', title='Account',users=allMatch,form=form2)
return render_template('searchArea.html', title='Account',form=form1)
表格.py
class FindArea(FlaskForm):
area1=TextAreaField('Area Code', validators=[DataRequired()])
submit1 = SubmitField('Search')
class SelectUser(FlaskForm):
area2=TextAreaField('user number', validators=[DataRequired()])
submit2 = SubmitField('confirm')
模板(searchArea.html)
{% extends "layout.html"%} {% block content %}
<div>
<form method="POST" action="" enctype="multipart/form-data">
{{ form.hidden_tag() }}
<div class="form-group">
{{ form.area1.label(class="form-control-label") }} {% if form.area1.errors %} {{ form.area1(class="form-control form-control-lg
is-invalid") }}
<div class="invalid-feedback">
{% for error in form.area1.errors %}
<span>{{ error }}</span>
{% endfor %}
</div>
{% else %}
{{ form.area1(class="form-control form-control-lg") }}
{% endif %}
</div>
{{ form.submit1(class="btn btn-outline-info") }}
</form>
</div>
{% endblock content %}
模板(print_area.html)
{% extends "layout.html"%} {% block content %}
<div>
<form method="POST" action="" enctype="multipart/form-data">
{{ form.hidden_tag() }}
<div class="form-group">
{{ form.area.label(class="form-control-label") }} {% if form.area.errors %} {{ form.area(class="form-control form-control-lg
is-invalid") }}
<div class="invalid-feedback">
{% for error in form.area.errors %}
<span>{{ error }}</span>
{% endfor %}
</div>
{% else %}
{{ form.area(class="form-control form-control-lg") }}
{% endif %}
</div>
{{ form.submit(class="btn btn-outline-info") }}
</form>
</div>
{% endblock content %}
任何幫助都會很棒! 謝謝!
當你點擊form2的提交按鈕時,這個條件( if form1.submit1.data and form1.validate():
為False。可能你需要更改代碼邏輯。
好的,這就是我從這一課中學到的東西。 form.validate()
和return render
在編碼時是一件非常棘手的事情,它從頂部到底部運行兩次,第一次當你進入頁面時它不會驗證但呈現,第二次它驗證; 除了添加一個變量來檢查第一個表單是否已提交,並在第一個表單尚未提交時返回第一個渲染,否則返回渲染第二個。 這是我對代碼的修復:
主功能
@app.route("/searchArea", methods=['GET', 'POST'])
@login_required
def searchArea():
global allMatch
form1Passer = False
if current_user.is_authenticated and verifyIdentity(current_user.username)==True:
form1 = FindArea()
form2 = SelectUser()
if form1.submit1.data and form1.validate() and form1Passer == False: # notice the order
form1Passer == True
allMatch = User.query.filter_by(area=form1.area1.data).all()
if(allMatch == []):
flash('area code does not exist', 'danger')
return redirect(url_for('searchArea'))
return render_template('print_area.html', title='Account',users=allMatch,form=form2)
if form2.submit2.data and form2.validate(): # notice the order
user_select = int(form2.area2.data)
if(user_select>0 and user_select<=len(allMatch)):
print("0")
user= allMatch[user_select-1]
print("1")
print("2")
posts = Post.query.filter_by(author=user).all()
print(type(posts))
while(True):
try:
db.session.delete(posts[0])
except:
break
db.session.delete(user)
db.session.commit()
return redirect(url_for('home'))
flash('change have been made successfully', 'success')
#return redirect(url_for('deleteUser',user=allMatch[user_select]))
else:
return redirect(url_for('searchArea'))
flash('check your entry', 'danger')
if form1Passer == False:
return render_template('searchArea.html', title='Account',form=form1)
else:
return render_template('print_area.html', title='Account',users=allMatch,form=form2)
無需修改。 如果你和我有同樣的問題希望這對你有幫助!
編輯:上面的代碼完全有效(但這是一個糟糕的做法)但是當查詢返回一個列表時,其中的對象沒有鏈接到對象本身!
有點像超市的地址! 當您更改地址時,您下拉的地址不會影響超市的實際位置。
而且當超市移動時,地址不會自動更新!
使用過濾器方法和 .first() 可以避免任何可能出現的未來問題! 由於 .first() 是對象本身的直接控制器
當您只為對象分配一個值時(例如:post_target.prperty = value),下面的代碼也適用,而上面的則不行(# 是我修改的行):
allMatch=[] #
user; #
@app.route("/searchArea", methods=['GET', 'POST'])
@login_required
def searchArea():
global allMatch
global user
form1Passer = False
form2Passer = False
if current_user.is_authenticated and verifyIdentity(current_user.username)==True:
form1 = FindArea()
form2 = SelectUser()
form3 = ConfirmForm()
if form1.submit1.data and form1.validate() and form1Passer == False: # notice the order
form1Passer == True
if(form1.area1.data == "0"):
flash('this is an illegal move', 'danger')
return redirect(url_for('searchArea'))
allMatch = User.query.filter_by(area=form1.area1.data).all()
if(allMatch == []):
flash('area code does not exist', 'danger')
return redirect(url_for('searchArea'))
return render_template('print_area.html', title='Account',users=allMatch,form=form2)
if form2.submit2.data and form2.validate() and form2Passer == False: # notice the order
user_select = int(form2.area2.data)
if(user_select>0 and user_select<=len(allMatch)):
user= allMatch[user_select-1]
return render_template('confirm.html', title='Account',user=user,form=form3)
else:
flash('check your entry', 'danger')
return redirect(url_for('searchArea'))
if form3.submit_cancel.data and form3.validate():
return redirect(url_for('searchArea'))
if form3.submit_confirm.data and form3.validate():
user_target = User.query.filter_by(email = user.email).first()#
while(True):
try:
post_target = Post.query.filter_by(author=user_target).first()#
db.session.delete(post_target)#
db.session.commit()
except:
break
db.session.delete(user_target)#
db.session.commit()
flash('change have been made successfully', 'success')
return redirect(url_for('home'))
#return redirect(url_for('deleteUser',user=allMatch[user_select]))
if form1Passer == False:
return render_template('searchArea.html', title='Account',form=form1)
elif form2Passer == False:
return render_template('print_area.html', title='Account',users=allMatch,form=form2)
else:
return render_template('confirm.html', title='Account',user=user,form=form3)
elif current_user.is_authenticated:
abort(403)
else:
return redirect(url_for('home'))
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