I have a table with this columns:
param_id
val_value
val_flag
date_value
tmp_value
tmp_flag
And I have an array of elements, I always have param_id and date_value, but sometimes i have val columns and other times I have tmp columns.
I use $data->save() because sometimes I need to create a new register in db and other times I need to update the register with param_id and date_value.
The question is: Is there any way to do an insert/update but when is an update, only update tmp columns or val columns? I think a find First is my only option, but maybe there is another way.
Thank you.
[EDIT]
I'm trying with the whitelist but it does not work. Let me explain how the method works: I get a request to a web service, process the xml and generate an array of elements with the information collected, after processing these elements I have an array of elements of the class appropriate to save, but these may be new or existing and may contain tmp or val values, I have tried with this but I still change the values to null.
if ($medida->tipo == 'temporal'){
$whiteList = array('val_value','val_flag');
}else if ($medida->tipo == 'validado'){
$whiteList = array('tmp_value','tmp_flag');
}
$dato->save(null, $whitelist);
I do not have data of the post, I use null instead, I have also tried to use an array with the manual assignment of the data obtaining the same result.
Here are two options that can help you:
1) Use 'whitelist' for the save() method.
$obj->save($this->request->getPost(), ['tmp_1', 'tmp_2']);
More info in the documentation.
2) Use the 'Event Manager'.
The methods beforeCreate() and beforeUpdate() will be useful so you can decide which fields to use.
More info in the documentation.
Also if you really want phalcon phql to update only columns which changed you need to enable dynamic update.
Related
I'm developing an application in Quasar/Electron and using Dexie/IndexedDB for my database. I want to find all distinct records in the database that contain both my Event ID and a Dog ID (both key indexed fields). I am able to do this with the following code:
await myDB.runTable
.orderBy('[fk_event+fk_dog]')
.eachUniqueKey((theDuo) => {
this.runsArray.push({eventID: theDuo[0], dogID: theDuo[1]})
})
I'm using a combined key which is working well. However, I need to have more of the records than just the keys. I need a few more fields, is this possible?
I was trying to get records with the unique key function while also using the where function, but that doesn't seem to work.
I need to get all the unique (distinct?) dogs in the table that are in a particular event. And also get their corresponding information. I'm not sure if there is a better, more efficient way to do this? I can always pull out all the records and loop through them to build a custom array, I was just hoping to do this at the table read level. (yeah I'm still in tables/records even though these are collections etc. :p ).
Even the above code gives me all the events, and I can pull out what I need with a filter. I just was thinking it would be faster and more efficient to do it at the read level.
this.enteredRuns = this.runsArray.filter((theEvent) => {
return ( (theEvent.eventID == this.currentEventID) )
})
Try
await myDB.runTable
.orderBy('[fk_event+fk_dog]')
.clone({unique: "unique"})
.toArray()
I know this isn't documented but it should do the work to use unique cursor while still extracting the whole objects and not just the keys. You cannot combine with where but you could use .filter. Just be aware that not all records with be scanned as it will jump over records with same keys - selecting the first visited records only.
Good afternoon fellow developers,
I have come across a scenario where I found myself needing to retrieve the list of pending changes from my model and editing a specific property of those entries before sending them to my back-end.
These are new entities I created using the createEntry() method of the OData model v2. But, at the time of creation of said entities, I do not possess the value I need to add to them yet. This is the list of entities I retrieve by using the getPendingChanges() method on my model:
What I need to do is to loop through each of these newly created entities and set a specific property into them before actually sending them to my back-end with the submitChanges() method. Bare in mind that these are entry objects created by the createEntry() method and exist only in my front-end until I am able to submit them with success.
Any ideas that might point me in the right direction? I look forward to reading from you!
I was able to solve this issue in the following way:
var oPendingChanges = this.model.getPendingChanges();
var aPathsPendingChanges = $.map(oPendingChanges, function(value, index) { return [index];});
aPathsPendingChanges.forEach(sPath => oModel.setProperty("/" + sPath + "/PropertyX","valueFGO"));
The first two instructions retrieve the entire list of pendingChanges objects and then builds an array of paths to each individual entry. I then use that array of paths to loop through my list of pending changes and edit into the property I want in each iteration of the loop. Special thanks to the folks at answers.sap for the guidance!
I have the following code
PagedResultList res = myService.getPage(paginateParams, ...)
println res.size() // returns 2
println res.getTotalCount() // returns 1
getPage looks like:
def criteria = MyDomain.createCriteria()
criteria.list(max: paginateParams.max, offset: paginateParams.offset) { // max is 10, offset is 0, sortBy is updatedAt and sortOrder is desc
eq('org', org)
order(paginateParams.sortBy, paginateParams.sortOrder)
}
why do the two method return different values? The documentation doesn't explain the difference, but does mention that getTotalCount is for number of records
currently on grails 2.4.5
edits:
println on res prints out:
res: [
com.<hidden>.MyDomain: 41679f98-a7c5-4193-bba8-601725007c1a,
com.<hidden>.MyDomain: 41679f98-a7c5-4193-bba8-601725007c1a]
Yes, res has a SINGLE object twice - that's the bug I'm trying to fix. How do I know that? I have an primary key on MyDomain's ID, and when I inspect the database, it's also showing one record for this particular org (see my criteria)
edit 2: I found this comment (http://docs.grails.org/2.4.5/ref/Domain%20Classes/createCriteria.html)
listDistinct If subqueries or associations are used, one may end up
with the same row multiple times in the result set. In Hibernate one
would do a "CriteriaSpecification.DISTINCT_ROOT_ENTITY". In Grails one
can do it by just using this method.
Which, if I understand correctly, is their way of saying "list" method doesn't work in this scenario, use listDistinct instead but then they go on to warn:
The listDistinct() method does not work well with the pagination
options maxResult and firstResult. If you need distinct results with
pagination, we currently recommend that you use HQL. You can find out
more information from this blog post.
However, the blog post is a dead link.
Related: GORM createCriteria and list do not return the same results : what can I do?
Not related to actual problem after question edited but this quote seems useful
Generally PagedResultList .size() perform size() on resultList property (in-memory object represent database record), while .getTotalCount() do count query against database. If this two value didn't match your list may contain duplicate.
After viewing related issues (GORM createCriteria and list do not return the same results : what can I do?) I determined that there were several approaches:
Use grails projection groupBy('id') - doesn't work b/c i need the entire object
USe HSQL - Domain.executeQuery - actually this didn't work for my scenario very well because this returns a list, whereas criteria.list returns a PagedResultList from which I previously got totalCount. This solution had me learning HSQL and also made me break up my existing logic into two components - one that returned PagedResultList and one that didn't
Simply keep a set of IDs as I process my PagedResultList and make sure that I didn't have any duplicates.
I ended up going with option 3 because it was quick, didn't require me to learn a new language (HSQL) and I felt that I could easily write the code to do it and I'm not limited by the CPU to do such a unique ID check.
My array contains a varying amount of objects. I need to iterate through the array and save each object id as a unique variable. Given the amount of objects within the array will vary, how should I do this?
"items"=>[{"id"=>"B00668BTCI"}, {"id"=>"B0041KJSL2"}]
I need to save the information to a new object that can support up to 16 IDs. #object.id_one, #object.id_two, etc...
The suitable way to save your data all depends upon how you want to reference it or access it later. Meta-programming is interesting and fun, but may be overkill depending upon your needs. You will need to determine that after looking at the choices. An alternative way is in an array:
array_of_ids = items.map(&:values).flatten
Or
array_of_ids = items.map { |item| item["id"] }
Then all of the IDs are in the array array_of_ids and becomes, in your example:
["B00668BTCI", "B0041KJSL2"]
Accessible by:
array_of_ids[0] # first id
array_of_ids[1] # second array
...
You need to do some meta-programming here...
Here is a post for you, it has an answer (by Chirantan) that shows how to create instance variables dynamically.
Hope this helps.
EDIT
Just in case you get interested to learn more, I have also found a good article about creating methods dynamically, check it out.
Dynamically adding class methods in Ruby by Ryan Angilly
I am new to learning and understanding how Hydration works, just wanted to point that out first. I'm currently able to Hydrate Select and Insert queries without any problems.
I am currently stuck on trying to Hydrate Update queries now. In my entity I have setup the get/set options for each type of column in my database. I've found that the ObjectProperty() Hydrator works best for my situation too.
However whenever I try to update only a set number of columns and extract via the hydrator I am getting errors because all the other options are not set and are returning null values. I do not need to update everything for a particular row, just a few columns.
For example in my DB Table I may have:
name
phone_number
email_address
But I only need to update the phone_number.
$entity_passport = $this->getEntityPassport();
$entity_passport->setPrimaryPhone('5551239876');
$this->getTablePassport()->update($this->getHydrator()->extract($entity_passport), array(
'employeeid' => '1'
));
This returns an error because setName() and setEmailAddress() are not included in this update and the query returns that the values cannot be null. But clearly when you look at the DB Table, there is data already there. The data that is there does not need to be changed either, only in this example does the PrimaryPhone() number.
I've been looking and reading documentation all over the place but I cannot find anything that would explain what I am doing wrong. I should note that I am only using Zend\Db (Not Doctrine).
I'm assuming I've missed something someplace due to my lack of knowledge with this new feature I'm trying to understand.
Perhaps you don't Hydrate Update queries... I'm sort of lost / confused. Any help would be appreciated. Thank you!
I think you're having a fundamental misconception of hydration. A hydrator simply populates an entity object from data (hydrate) and extracts data from an entity object (extract). So there are no separate hydrators for different types of queries.
In your update example you should first retrieve the complete entity object ($entity_passport) and then pass it to the TableGateway's update method. You would retrieve the entity by employeeid, since that's the condition you're using to update. So something like this:
$entity_passport = $passportMapper->findByEmployeeId(1);
$entity_passport->setPrimaryPhone('5551239876');
$this->getTablePassport()->update($this->getHydrator()->extract($entity_passport), array(
'employeeid' => $entity_passport->getId()
));
This is assuming you have some sort of mapper layer. Otherwise you could use your passport TableGateway (I assume that's what getTablePassport() returns, no?).
Otherwise, if you think retrieving the object is too much overhead and you just want to run the query you could use just a \Zend\Db\Sql\Sql object, ie:
$sql = new \Zend\Db\Sql\Sql($dbAdapter);
$update = $sql->update('passport')
->set(array('primary_phone' => $entity_passport->getPrimaryPhone()))
->where(array('employeeid' => $employeeId));
Edit:
Maybe it was a mistake to bring up the mapper, because it may cause more confusion. You could simply use your TableGateway to retrieve the entity object and then hydrate the returned row:
$rows = $this->getTablePassport()->select(array('employeeid' => 1));
$entity_passport = $this->getHydrator($rows->current());
[...]
Edit 2:
I checked your gist and I noticed a few things, so here we go:
I see that your getTablePassport indeed does return an object which is a subclass of TableGateway. You have already set up this class for it to use a HydratingResultset. This means you don't need to do any manual hydrating when retrieving objects using the gateway.
You also already implemented a Search method in that same class, so why not just use that? However I would change that method, because right now you're using LIKE for every single column. Not only is it very inefficient, but it will also give you wrong results, for example on the id column.
If you were to fix that method then you can simply call it in the Service object:
$this->getTablePassport->Search(array('employeeid' => 1));
Otherwise you could just implement a separate method in that tablegateway class, such as
public function findByEmployeeId($employeeId)
{
return $tableGateway->select(array('employeeid' => $employeeId));
}
This should already return an array of entities (or one in this specific case). P.S. make sure to debug and check what is actually being returned when you retrieve the entity. So print_r the entity you get back from the PassportTable before trying the update. You first have to make sure the retrieval code works well.