I am struggling with a basic problem. i am using cake php 2.5. i try to apply the find query in the company model and receiving all the data from companies and with its associations, but i only want to receive the data from company table and want to exclude the data from rest of relationships, can anyone help me with this. below are my queries.
$this->loadModel('Company');
$fields=array('id','name','logo','status');
$conditions=array('status'=>1);
$search_companies = $this->Company->find('first',
compact(array('conditions'=>$conditions,'fields'=>$fields)));
print_r($search_companies);die();
echo json_encode($search_companies);die();
With out seeing your data output, I am just going to take a stab at the problem.
Inside your $search_companies variable you are getting a multidimensional array probably with the other values of the other tables.
Why not just select the one array:
$wantedData = $search_companies['Company'];
// The key Company (which is the model) should be the data you are wanting.
Try setting model's recursive value to -1
$this->Company->recursive = -1;
$search_companies = $this->Company->find('first',
compact(array('conditions'=>$conditions,'fields'=>$fields)));
With this you will not fire the joins queries and therefore you only retrieve model's information.
Cakephp provide this functionality that we can unblind few/all associations on a any model. the keyword unbindModel is used for this purpose. inside the unblindModel you can define the association type and model(s) name that you want to unblind for that specific association.
$this->CurrentModelName->unbindModel(array('AssociationName' => array('ModelName_Youwwant_unblind')));
Related
I’m using NestJS with TypeORM, database is MySQL, and I’d like to filter multiple parameters that can be passed in.
The frontend has a list of products and filters are applied as query params sent to NestJS, filtering works for a single param eg api.example.com?manufacturer=Acer but how would I filter an Array eg api.example.com?manufacturer=Acer,Toshiba,Asus.
I tried quite a few things in TypeORM, currently using the QueryBuilder to build the array with an if statement if the filter exists if so I’m doing something like a where statement.
.andWhere(manufacturer = filterOne, {filterOne: *manufacturers from the query param*})
But yeah just can’t hack something together, tried a couple of things, above is a rough example, did try methods that TypeORM had as an example on filtering arrays but it seemed like it was more for an array of integers only? Regardless, I’m open to any methods that allow for the end result of filtering the example I provided, cheers and thanks again!
You have to use IN to get all data where manufacturer equal the data came from the query, first, you have to convert the query to an array:
var manufacturerParam = filterOne.split(",");
then add it to your query:
.andWhere(manufacturer IN (:filter)", { filter: manufacturerParam })
I have a model called lists, which has a column called item_ids. item_ids is a JSON column (MySQL) and the column contains array of UUIDs, each referring to one item.
Now when someone creates a new list, I need to search whether there is an existing list with same set of UUIDs, and I want to do this search using query itself for faster response. Also use ActiveRecord querying as much as possible.
How do i achieve this?
item_ids = ["11E85378-CFE8-39F8-89DC-7086913CFD4B", "11E85354-304C-0664-9E81-0A281BE2CA42"]
v = List.new(item_ids: item_ids)
v.save!
Now, how do I check whether a list exists which has item ids exactly matches with that mentioned in query ? Following wont work.
list_count = List.where(item_ids: item_ids).count
Edit 1
List.where("JSON_CONTAINS(item_ids, ?) ", item_ids.to_json).count
This statement works, but it counts even if only one of the item matches. Looking for exact number of items.
Edit 2
List.where("JSON_CONTAINS( item_ids, ?) and JSON_LENGTH(item_ids) = ?", item_ids.to_json, item_ids.size).count
Looks like this is working
You can implement a has many relation between lists and items and then access like this.
List.includes(:item).where('items.id in (?)',item_ids)
To implement has_many relation:
http://guides.rubyonrails.org/association_basics.html#the-has-many-through-association
I have a design problem with SQL request:
I need to return data looking like:
listChannels:
-idChannel
name
listItems:
-data
-data
-idChannel
name
listItems:
-data
-data
The solution I have now is to send a first request:
*"SELECT * FROM Channel WHERE idUser = ..."*
and then in the loop fetching the result, I send for each raw another request to feel the nested list:
"SELECT data FROM Item WHERE idChannel = ..."
It's going to kill the app and obviously not the way to go.
I know how to use the join keyword, but it's not exactly what I want as it would return a row for each data of each listChannels with all the information of the channels.
How to solve this common problem in a clean and efficient way ?
The "SQL" way of doing this produces of table with columns idchannel, channelname, and the columns for item.
select c.idchannel, c.channelname, i.data
from channel c join
item i
on c.idchannel = i.idchannel
order by c.idchannel, i.item;
Remember that a SQL query returns a result set in the form of a table. That means that all the rows have the same columns. If you want a list of columns, then you can do an aggregation and put the items in a list:
select c.idchannel, c.channelname, group_concat(i.data) as items
from channel c join
item i
on c.idchannel = i.idchannel
group by c.idchannel, c.channelname;
The above uses MySQL syntax, but most databases support similar functionality.
SQL is made for accessing two-dimensional data tables. (There are more possibilities, but they are very complex and maybe not standardized)
So the best way to solve your problem is to use multiple requests. Please also consider using transactions, if possible.
I am using SQL Alchemy and I want to return a list of Document Ids. The Ids are the primary key in the documents table. My current query returns a list of tuples.
userDocs = session.query(Document.idDocument).filter(Document.User_idUser == user.idUser).all()
The reason I want a list of ids is so that I can search another table using in_(userDocs).
So another solution would be to be able to search using tuples. I am currently returning nothing from my second query using userDocs.
Thank you!!
You don't need to do an intermediate query, you can do this all in one shot!
things = session.query(Things) \
.join(Thing.documents) \
.filter(Document.User_idUser==user.idUser)
You just query on the properties of the Document through its relationship() on the intended entity.
I've got records in my MySQL projects database that have several boolean flags to help me sort the data. I have 3 categories planning, landscape, and environmental and 4 classes (or subcategories) for each category; industrial, government, education, residential.
My goal is to use ColdFusion to create and store the project_id numbers in an array of some kind that will basically have the projects sorted by category and class. That way I can grab just the industrial projects in the planning category and construct a link to that project.
So, the first position in the array would be planning and inside that first position would be the 4 classes, then, within that would be all of the project_id numbers that returned true for those particular criteria.
The logic I'm looking to create goes like this...
Loop over the query result, if planning = true and industrial = true, place the project id # into the planning array inside the industrial array.
How can I use <cfloop> to loop over the list of project records, recognize the category and class flags and construct a clean and usable dataset? Can this be handles in the query in some way?
Figure out the desired data structure
look at your existing data structure
figure out the algorithm to translate from one to the other
You may cfloop the query, and use a large cfswitch (or large set of if-then-else) to figure out how you want to store the id in your desired data structure. Or if you can map the class/category name as a struct key, then it might be easier.
Or you may use cfoutput group="" if it helps (cfloop group="" is available on in CF10+)
Finally, maybe you don't even need the data structure, just use Query of Queries wherever you need.
You may be able to utilize the Underscore.cfc library for this. For example, you could use the filter function to extract an array of structs representing the query rows you want:
planningArray = _.filter(queryResult, function(row){
return (row.planning == true && row.industrial == true);
});