increase alt text max length

same as Lemmy and Mastodon

app/community/forms.py

@@ -152,7 +152,7 @@ class CreateVideoForm(FlaskForm):
 class CreateImageForm(FlaskForm):
     communities = SelectField(_l('Community'), validators=[DataRequired()], coerce=int, render_kw={'class': 'form-select'})
     image_title = StringField(_l('Title'), validators=[DataRequired(), Length(min=3, max=255)])
-    image_alt_text = StringField(_l('Alt text'), validators=[Optional(), Length(min=3, max=255)])
+    image_alt_text = StringField(_l('Alt text'), validators=[Optional(), Length(min=3, max=1500)])
     image_body = TextAreaField(_l('Body'), validators=[Optional(), Length(min=3, max=5000)], render_kw={'rows': 5})
     image_file = FileField(_l('Image'), validators=[DataRequired()])
     tags = StringField(_l('Tags'), validators=[Optional(), Length(min=3, max=5000)])

app/models.py

@@ -204,7 +204,7 @@ class File(db.Model):
     file_name = db.Column(db.String(255))
     width = db.Column(db.Integer)
     height = db.Column(db.Integer)
-    alt_text = db.Column(db.String(300))
+    alt_text = db.Column(db.String(1500))
     source_url = db.Column(db.String(1024))
     thumbnail_path = db.Column(db.String(255))
     thumbnail_width = db.Column(db.Integer)

migrations/versions/2191fa36c09d_increase_alt_text_length.py

@@ -0,0 +1,38 @@
+"""increase alt text length
+
+Revision ID: 2191fa36c09d
+Revises: dfba54bdaeb2
+Create Date: 2024-05-25 22:43:40.203295
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '2191fa36c09d'
+down_revision = 'dfba54bdaeb2'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('file', schema=None) as batch_op:
+        batch_op.alter_column('alt_text',
+               existing_type=sa.VARCHAR(length=300),
+               type_=sa.String(length=1500),
+               existing_nullable=True)
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('file', schema=None) as batch_op:
+        batch_op.alter_column('alt_text',
+               existing_type=sa.String(length=1500),
+               type_=sa.VARCHAR(length=300),
+               existing_nullable=True)
+
+    # ### end Alembic commands ###