'AuditLogDiff' object has no attribute 'type'

[ghost]

Summary

AuditLogDiff seems to be missing the 'type' attribute despite the official API docs clearly saying that AuditLogDiff should have an attribute 'type'.

Reproduction Steps

I simply ran the following code

@client.event
async def on_guild_channel_update(channelold,channelnew):
    print('channel "'+str(channelold.name)+'" (now called "'+str(channelnew.name)+'" was updated!')
    # Grab audit log
    updatelog = await channelnew.guild.audit_logs(limit=1,action=discord.AuditLogAction.channel_update).flatten()
    print(str(updatelog[0].user.name))
    cName = False
    cPos = False
    cNSFW = False
    cPerms = False
    cTopic = False
    cSlow = False
    
    cBefore = updatelog[0].before
    cAfter = updatelog[0].after
    
    if cBefore.type == 1:
        return

Expected Results

The code snippet would run perfectly fine without errors, continuing if the channel was a text channel, and stopping if it was a voice channel.

Actual Results

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/discord/client.py", line 312, in _run_event
    await coro(*args, **kwargs)
  File "./etp_bot/bot.py", line 131, in on_guild_channel_update
    if cBefore.type == 1:
AttributeError: 'AuditLogDiff' object has no attribute 'type'

Checklist

• I have searched the open issues for duplicates.
• I have shown the entire traceback, if possible.
• I have removed my token from display, if visible.

System Information

• Python v3.7.3-final
• discord.py v1.4.1-final
• aiohttp v3.6.2
• system info: Linux 4.19.113+ load_opus() missing 1 required positional argument: 'name' #1300 Thu Mar 26 16:47:42 GMT 2020

Notes

(by the way, I am aware I could easily use channelold.type but a bug is still a bug and that workaround may not always be available)

[Vexs]

These attrs are added at runtime from the API payloads- if the API doesn't provide a key, it won't be included in the object, which is documented.
Given the shifting nature of discord's API I wouldn't necessarily rely on any fields being there frankly.

[SebbyLaw]

According to the discord documentation, type is implied to be used only when a channel is created:
> type of entity created

> (by the way, I am aware I could easily use channelold.type but a bug is still a bug and that workaround may not always be available)

`This is false.

Edit: Apologies for the rudeness and the semi-wrong answer. type will only be a valid property when the channel type is changed, which currently only happens when a text channel becomes a news channel.

[Rapptz]

The attribute AuditLogDiff.type depends on the AuditLogAction that is being iterated on. You can see which audit log actions support the type attribute in the documentation.