I am developing a blog application in flask. In html file to display posts
there is option for commenting. But I am not able to retrieve the ORM
object 'post' corrresponding to comment form while submitting form. My
index.html file:
{% extends "base.html" %}{% block content %}
<h1>Hi, {{ g.user.nickname }}!</h1>
<form action="" method="post" name="post">
{{ form.hidden_tag() }}
<table>
<tr>
<td>Say something:</td>
</tr>
<tr>
<td>Title</td>
<td>{{ form.title(size=30, maxlength=140) }}</td>
<td>
{% for error in form.title.errors %}
<span style="color: red;">[{{ error }}]</span><br>
{% endfor %}
</td>
</tr>
<tr>
<td>Content</td>
<td>{{ form.post(size=30, maxlength=2000) }}</td>
<td>
{% for error in form.post.errors %}
<span style="color: red;">[{{ error }}]</span><br>
{% endfor %}
</td>
</tr>
<tr>
<td></td>
<td><input type="submit" name="btn" value="Post!"></td>
<td></td>
</tr>
</table>
</form>
{% for post in posts.items %}
<div class="{{ post.id }}">
<div>
{% include 'post.html' %}
</div>
<hr>
<div class="row-fluid">
<div class="span11 offset1">
<div class="comments">
{% if post.comments %}
<p>
{% for comment in post.comments %}
<p><i>{{ comment.name }}</i>: {{ comment.body }}</p>
{% endfor %}
</p>
{% endif %}
</div>
</div>
</div>
<div>
<form action="" method="post" name="post">
{{ form.hidden_tag() }}
<input type="hidden" name="p_id" value="{{post}}">
<table>
<tr>
<td>Add a comment:</td>
</tr>
<tr>
<td>Name</td>
<td>{{ form.title(size=30, maxlength=40) }}</td>
<td>
{% for error in form.title.errors %}
<span style="color: red;">[{{ error
}}]</span><br>
{% endfor %}
</td>
</tr>
<tr>
<td>Comment</td>
<td>{{ form.post(size=30, maxlength=140) }}</td>
<td>
{% for error in form.post.errors %}
<span style="color: red;">[{{ error
}}]</span><br>
{% endfor %}
</td>
</tr>
<tr>
<td></td>
<td><input type="submit" name="btn"
value="Comment"></td>
<td></td>
</tr>
</table>
</form>
</div>
</div>
{% endfor %}
{% if posts.has_prev %}<a href="{{ url_for('index', page=posts.prev_num)
}}"><< Newer posts</a>{% else %}<< Newer posts{% endif %} | {% if
posts.has_next %}<a href="{{ url_for('index', page=posts.next_num) }}">Older
posts >></a>{% else %}Older posts >>{% endif %}
{% endblock %}
And view file have this:
@app.route('/', methods=['GET', 'POST'])@app.route('/index', methods=['GET',
'POST'])@app.route('/index/<int:page>', methods=['GET',
'POST'])@login_requireddef index(page=1):
form = PostnCommentForm()
if form.validate_on_submit():
if request.form['btn'] == 'Post!':
post = Post(title=form.title.data, body=form.post.data,
timestamp=datetime.utcnow(), author=g.user)
db.session.add(post)
db.session.commit()
flash('Your post is now live!')
return redirect(url_for('index'))
else:
comment = Comment(name=form.title.data, body=form.post.data,
timestamp=datetime.utcnow(), parent_post=form.p_id.data)
db.session.add(comment)
db.session.commit()
flash('Your comment is now live!')
return redirect(url_for('index'))
posts = g.user.blog_posts().paginate(page, POSTS_PER_PAGE, False)
return render_template('index.html',
title='Home',
form=form,
posts=posts)
Model:
class Post(db.Model):
id = db.Column(db.Integer, primary_key = True)
title = db.Column(db.String(140))
body = db.Column(db.String(2000))
timestamp = db.Column(db.DateTime)
user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
comments = db.relationship('Comment', backref='parent_post', lazy='dynamic')
def __repr__(self):
return '<Post %r>' % (self.body)
class Comment(db.Model):
id = db.Column(db.Integer, primary_key = True)
name = db.Column(db.String(40))
body = db.Column(db.String(140))
timestamp = db.Column(db.DateTime)
post_id = db.Column(db.Integer, db.ForeignKey('post.id'))
Form.py file:
from flask.ext.wtf import Formfrom wtforms import StringField, BooleanField,
TextAreaField, IntegerFieldfrom wtforms.validators import DataRequired,
Lengthfrom app.models import User
class PostnCommentForm(Form):
post = StringField('post', validators=[DataRequired()])
title = StringField('title', validators=[DataRequired()])
p_id= IntegerField('p_id')
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