zulip/zerver/migrations/0097_reactions_emoji_code.py

# Generated by Django 1.11.2 on 2017-06-18 21:26
import os

import orjson
from django.db import migrations, models
from django.db.backends.postgresql.schema import DatabaseSchemaEditor
from django.db.migrations.state import StateApps


def populate_new_fields(apps: StateApps, schema_editor: DatabaseSchemaEditor) -> None:
    # Open the JSON file which contains the data to be used for migration.
    MIGRATION_DATA_PATH = os.path.join(
        os.path.dirname(os.path.dirname(__file__)), "management", "data"
    )
    path_to_unified_reactions = os.path.join(MIGRATION_DATA_PATH, "unified_reactions.json")
    with open(path_to_unified_reactions, "rb") as f:
        unified_reactions = orjson.loads(f.read())

    Reaction = apps.get_model("zerver", "Reaction")
    for reaction in Reaction.objects.all():
        reaction.emoji_code = unified_reactions.get(reaction.emoji_name)
        if reaction.emoji_code is None:
            # If it's not present in the unified_reactions map, it's a realm emoji.
            reaction.emoji_code = reaction.emoji_name
            if reaction.emoji_name == "zulip":
                # `:zulip:` emoji is a zulip special custom emoji.
                reaction.reaction_type = "zulip_extra_emoji"
            else:
                reaction.reaction_type = "realm_emoji"
        reaction.save()


class Migration(migrations.Migration):

    dependencies = [
        ("zerver", "0096_add_password_required"),
    ]

    operations = [
        migrations.AddField(
            model_name="reaction",
            name="emoji_code",
            field=models.TextField(default="unset"),
            preserve_default=False,
        ),
        migrations.AddField(
            model_name="reaction",
            name="reaction_type",
            field=models.CharField(
                choices=[
                    ("unicode_emoji", "Unicode emoji"),
                    ("realm_emoji", "Custom emoji"),
                    ("zulip_extra_emoji", "Zulip extra emoji"),
                ],
                default="unicode_emoji",
                max_length=30,
            ),
        ),
        migrations.RunPython(
            populate_new_fields, reverse_code=migrations.RunPython.noop, elidable=True
        ),
    ]