I want to record events based on on a date. I also want people to be able to search for event based on a particular date and the person who recorded the event.
For example:
Person A logs in and sees a calendar, click on a day/date and records an event for that day.
Person B logs in and sees a calendar, click on a day/date and records an event for that day.
Person C comes and does the same thing.
Note that either of these persons can record more than one event.
I want to be able record this data effectively in the database and search for these events based on a number of different criteria.
Please can someone help me with a data structure for this problem?
Person
ID
Name
PersonalEvent
ID
Person
Name
Date
Related
I'm trying to query attendance for a Google Meet conference created via Google Calendars API.
I've found that the conferenceId returned by Calendar API > Events > insert it's different from the one I can use to filter in Reports API.
conferenceId from Calendar API --> ["conferenceId"]=>string(12) "xxx-xxxx-xxx"
conferenceId from Reports API{"name": "conference_id", "value": "xxxxxxx_12234XXXXXxxxxXX56"}
Does anyone knows why?
How can I query attendance based on the data returned by Calendar API > Events > insert ?
Steps to reprocuduce:
Insert calendar events (be sure to add conferenceData structure to create also the Meet conference):
https://developers.google.com/calendar/api/v3/reference/events/insert
Use the conference
List activities from Report API and check the conference_id: https://developers.google.com/admin-sdk/reports/reference/rest/v1/activities/list
It seems that the conferenceId from the Calendar event object is different from the conference_id in the Reports (note that the name is different). The activities.list output also has another field called meeting_code, it's also under items.events.parameters:
{
"name": "meeting_code",
"value": "ASDFASFFGJ"
}
This one matches the conferenceId in a calendar event, except that it's without dashes and capitalized, so for the example "conferenceId": "asd-fasf-fgj" in a Calendar Event object you'll find "meeting_code": "ASDFASFFGJ" in the activity reports. So you can just remove the dashes and capitalize the conferenceId to match it to its corresponding meeting_code.
As to why this discrepancy exists, my guess after reading the definition of the Meet activity events is that it tracks different "conference sessions" within the same meeting code. For example, if you join the meeting asd-fasf-fgj it will create a new conference_id until everyone leaves the meeting. Then if the same meeting code is used again a different conference_id will be created to track the new session and so on.
I did some cursory testing and the logs do create a different conference_id every time I joined the same Meeting code. I didn't have multiple accounts to test so I'm not sure if two users can have matching IDs, but I may be close. I couldn't find any in-depth documentation so it would require more testing to figure out exactly how it works.
Either way, to address your immediate concern, you should be able to match the Event's conferenceId with the Report's meeting_code to track the attendance.
Reference:
Meet Activity log definition
We have a service which syncs our calender with an exhange calender. In the synchronisation process we use the unique ids to identify the appointments. Now we have a customer, which has non-unique UniqueIds.
I used the EwsEditor (https://github.com/dseph/EwsEditor) to inspect the elements and yes, both appointments (same user, same month, same UniqueId, but a different appointment) have exact the same UniqueId.
Both appointments are not created with our software. They are manually created by the user via Outlook.
Is there a reason why the exchange creates appointments/meetings with the same Ids?
Are you saying that an Id has been reused (if so that's possible as it will still be unique). Or are you saying that you have two id's in the same calendar that are the same if so are you sure your not confusing recurring appointments or that fact that the UnqiueId's are base64 encoded so this means the Id's are case sensitive.
That said using the UniqueId for calendar appointment isn't a great idea and you would be better using the GOID property like PidLidCleanGlobalObjectId https://learn.microsoft.com/en-us/office/client-developer/outlook/mapi/pidlidcleanglobalobjectid-canonical-property
I'm a teacher who manages a caseload of students who have yearly meetings. Each year their services, hours, supports, etc. change. We complete a survey on each student to record all this data on a single spreadsheet. I want to pull data from those submissions to replace the students' information with the most recently dated information in our caseload master report (Tab one). If no data is entered yet I want it to remain the same.
The first tab is what we use for reporting to our team and the IEP completion tab is where the survey data is imported. I tried some solutions such as VLOOKUP with some IF statements but I don't think that is the correct route to go.
I scrubbed the linked Google spreadsheet for confidentiality.
Assuming Student ID#/ID Number is a reliable unique index in a third sheet create a VLOOKUP of the ID Number's associated fields from Tab1. Fields not found will error, so wrap your VLOOKUP with IFERROR and an INDEX/MATCH (because the ID there is not in ColumnA) of the fields in Tab2.
Theoretically when using event sourcing you don't store "state" but events. But I saw in many implementations that you store snapshots of state in a column in a format like JSON or just a BLOB. For example:
Using an RDBMS as event sourcing storage
The events table has Data column which stores entire object. To me, it's like storing state for that given time when some event occurred.
Also this picture(taken from Streamstone):
It has Data column with a serialized state. So it stores state too but inside an Event?
So how to replay from the initial state then, If I can simply pick some event and access Data to get the state directly.
What exactly is stored inside Data, is it a state of the entire object or it's serialized event?
Let's say I have a person object (in C#)
public class Person
{
public string Name { get; set }
public int Age { get; set; }
}
What should my event store when I create a person or change properties like name or age.
When I create a Person I most likely will send something like PersonCreatedEvent with the initial state, so the entire object.
But what if I change Name or Age should they be 2 separate events or just 1? PersonChangedEvent or PersonChangedAgeEvent and PersonChangedNameEvent?
What should be stored in the event in this case?
What exactly is stored inside Data, is it a state of the entire object or it's serialized event?
That will usually be a serialized representation of the event.
One way of thinking about it: a stream of events is analogous to a stream of patch documents. Current state is calculated by starting from some known default state and then applying each patch in turn -- aka a "fold". Previous states can be recovered by choosing a point somewhere in the stream, and applying the patches up to that point.
The semantics of events, unlike patches, tends to be domain specific. So Checked-In, Checked-Out rather than Patched, Patched.
We normally keep the events compact - you won't normally record state that hasn't changed.
Within your domain specific event language, the semantics of a field in an event may be "replace" -- for example, when recording a change of a Name, we probably just store the entire new name. In other cases, it may make sense to "aggregate" instead -- with something like an account balance, you might record credits and debits leaving the balance to be derived, or you might update the total balance (like a gauge).
In most mature domains (banking, accounting), the domain language has semantics for recording changes, rather than levels. We write new entries into the ledger, we write new entries into the checkbook register, we read completed and pending transactions in our account statement.
But what if I change Name or Age should they be 2 separate events or just 1? PersonChangedEvent or PersonChangedAgeEvent and PersonChangedNameEvent?
It depends.
There's nothing wrong with having more than one event produced by a transaction.
There's nothing wrong with having a single event schema, that can be re-used in a number of ways.
There's nothing wrong with having more than one kind of event that changes the same field(s). NameLegallyChanged and SpellingErrorCorrected may be an interesting distinction to the business.
Many of the same concerns that motivate task based UIs apply to the design of your event schema.
It still seems to me like PersonChangedEvent will contain all person properties that can change. Even if they didn't change
In messaging (and event design takes a lot of lessons from message design), we often design our schema with optional fields. So the event schema can be super flexible, while any individual representation of an event would be compact (limited to only the information of interest).
To answer your question, an event that is stored should be the event data only. Not the objects state.
When you need to work on your Entity, you read up all the events and apply them to get the latest state every time. So events should be stored with the events data only. (ofc together with AggregateId, Version etc)
The "Objects State" will be the computation of all events, but if you have an Eventlistener that listens to all your published events you can populates a separate ReadModel for you. To query against and use as read only from a users perspective.
Hope it helps!
Updated answer to updated question:
Really depends on your model, if you do the update at the same time Age and Name, yes the new age and name values should be stored in a new event.
The event should only contain this data "name and age with aggregateId, version etc"
The event listener will listen specifically on each event (created, updated etc), find the aggregates read model that you have stored and only update these 2 properties (in this example).
For createevent you create the object for the read model.
I'm creating an app in Titanium that uses the Facebook Graph API to get all the users events, however, the venue information, it only brought to me, after I was very specific about the field, and some times, a lot of the times, when the Event was created in a known location, it only brings the venue_id, and when I query the venue(via http://graph.facebook.com), then it gives me the venue location details, more importantly, the latitude and longitude of the thing.
Is it possible to bring the information of the venue in the same response?
Also, it only brings the events that the user is attending, is there any way to show the events recommended to him also?
Ti.Facebook.requestWithGraphPath('me/events?limit=5000&fields=id,owner,name,description,start_time,end_time,location,venue,privacy,updated_time', {}, 'GET', function(e) {
obj = JSON.parse(e.result);
Ti.API.info('Events: '+JSON.stringify(obj));
}}); // Facebook Events
Also, it only brings the events that the user is attending, is there any way to show the events recommended to him also?
Not sure what exactly you mean by “recommended” … if you mean events the user has been invited to, then you can query the FQL event_member table with the user id.
You can kind of “join” the info from the table above with the event table by selecting from that using WHERE eid IN (SELECT … FROM event_member WHERE …)
Is it possible to bring the information of the venue in the same response?
Using a multi-query you can do it, similar to as it is described here: FQL: query for event table returns venue.name instead of venue.id