Change validation process (currently broken)

app/corpora/forms.py

@@ -1,4 +1,5 @@
 from flask_wtf import FlaskForm
+from werkzeug.utils import secure_filename
 from wtforms import (BooleanField, FileField, StringField, SubmitField,
                      ValidationError, IntegerField, SelectField)
 from wtforms.validators import DataRequired, Length
@@ -21,10 +22,18 @@ class AddCorpusFileForm(FlaskForm):
     submit = SubmitField()
     title = StringField('Title', validators=[DataRequired(), Length(1, 255)])
 
-    def validate_file(form, field):
+    def __init__(self, corpus, *args, **kwargs):
+        super(AddCorpusFileForm, self).__init__(*args, **kwargs)
+        self.corpus = corpus
+
+    def validate_file(self, field):
         if not field.data.filename.lower().endswith('.vrt'):
             raise ValidationError('File does not have an approved extension: '
                                   '.vrt')
+        filename = secure_filename(field.data.filename)
+        for corpus_file in self.corpus.files:
+            if filename == corpus_file.filename:
+                raise ValidationError('File already registered to this corpus.')
 
 
 class EditCorpusFileForm(FlaskForm):

app/corpora/views.py

@@ -1,3 +1,4 @@
+from app import logger
 from flask import (abort, current_app, flash, make_response, redirect, request,
                    render_template, url_for, send_from_directory)
 from flask_login import current_user, login_required
@@ -92,15 +93,13 @@ def add_corpus_file(corpus_id):
     corpus = Corpus.query.get_or_404(corpus_id)
     if not (corpus.creator == current_user or current_user.is_administrator()):
         abort(403)
-    add_corpus_file_form = AddCorpusFileForm()
+    add_corpus_file_form = AddCorpusFileForm(corpus, prefix='add-job-form')
-    if add_corpus_file_form.validate_on_submit():
+    if add_corpus_file_form.is_submitted():
+        if not add_corpus_file_form.validate():
+            logger.warning(add_corpus_file_form.errors)
+            return make_response(add_corpus_file_form.errors, 400)
         file = add_corpus_file_form.file.data
         filename = secure_filename(file.filename)
-        for corpus_file in corpus.files:
-            if filename == corpus_file.filename:
-                flash('File already registered to this corpus.')
-                return make_response({'redirect_url': url_for('corpora.corpus', corpus_id=corpus.id)}, 500)
-                # return redirect(url_for('corpora.add_corpus_file', corpus_id=corpus_id))
         # Save the file
         dir = os.path.join(str(corpus.user_id), 'corpora', str(corpus.id))
         file.save(os.path.join(current_app.config['NOPAQUE_STORAGE'],

app/static/js/nopaque.js

@@ -133,6 +133,7 @@ nopaque.Forms.init = function() {
         window.location.href = JSON.parse(this.responseText).redirect_url;
       }
       if (request.status === 400) {
+        console.log(request);
         for (let [field, errors] of Object.entries(JSON.parse(this.responseText))) {
           fieldElement = form.querySelector(`input[name="add-job-form-${field}"]`).closest(".input-field");
           for (let error of errors) {