Continuing on my project, I need to translate some SQL statements to mongoDB
My SQL Statement is:
Delete from 'table' where proc_id = $xxx and (day_id < $day OR day_id > $anotherDay)
Now my condition array is this:
$condicion = array(
'proc_id' => $xxx,
'$or' => array(
'day_id' => array(
'$lt' => $day,
'$gt' => $anotherDay
)
)
);
The function made for delete in mongo collections returns cannot delete...
Some help please?
Each "day_id" would be in it's own $or argument:
$query = array(
'proc_id' = > $xxx,
'$or' => array(
array( 'day_id' => array ( '$lt' => $day ) ),
array( 'day_id' => array ( '$gt' => $anotherDay ) ),
)
)
That is how $or conditions work as a "list" of possible expressions.
The JSON syntax is clearer to visualise:
{
"proc_id": $xxx,
"$or": [
{ "day_id": { "$lt": $day } },
{ "day_id": { "$gt": $anotherDay }}
]
}
Since there is a very clear distinction between a "list" and an "object" definition. $or conditions are "lists" of "objects", and that means you list the full condition just as if it were a query in itself. Since this is not called within an $elemMatch.
And of course the "DELETE" part is the .remove() method:
$collection->remove($query)
There are general examples and resources in the core documentation SQL to MongoDB Mapping Chart, where if the examples there do not immediately help, the linked articles and presentations should.
Related
My goal is to subtract the current date from the stored date, and compared them to a saved interval value by the user.
I am running into the following error trying to use redact.
MongoResultException: localhost:27017: this object is already an operator expression, and can't be used as a document expression (at '0')
My code looks like this:
<?php
$ops = array(
array(
'$redact' => array(
'$cond' => array(
'if' => array(
'$gte' => array('$subtract' => array('$new Date()' , '$last_interacted_date'), '$reminder_interval')
),
'then' => '$$KEEP',
'else' => '$$PRUNE'
)
)
)
);
$results = $collection ->aggregate($ops);
For some reason the $subtract is causing this error. Why is the presence of subtract causing: "this object is already an operation expression'?
$new Date() is not valid here. You want MongoDate or MongoDB\BSON\UTCDateTime appropriate to your driver instead.
$ops = array(
array(
'$redact' => array(
'$cond' => array(
'if' => array(
'$gte' => array(
'$subtract' => array(
new UTCDateTime(round(microtime(true) * 1000)),
'$last_interacted_date'
),
'$reminder_interval'
)
),
'then' => '$$KEEP',
'else' => '$$PRUNE'
)
)
)
);
$results = $collection ->aggregate($ops);
The interpolation of the Date value actually happens in the "client" and "before" the aggregation pipeline is actually sent to the server. So you get the "milliseconds" as of "now" and send as a "BSON Date".
Note that this is "millseconds" in difference from the two BSON dates, so your "interval" needs to be in milliseconds, or otherwise do the math to convert further.
I want to use aggregation to get this array only with those tickets, which have start field after 2015-06-16. Can someone help me with the pipeline?
{
"name" : "array",
"tickets" : [
{
"id" : 1,
"sort" : true,
"start" : ISODate("2015-06-15T22:00:00.000Z")
},
{
"id" : 2,
"sort" : true,
"start" : ISODate("2015-06-16T22:00:00.000Z")
},
{
"id" : 3,
"sort" : true,
"start" : ISODate("2015-06-17T22:00:00.000Z")
}
]
}
It's true that the "standard projection" operations available to MongoDB methods such as .find() will only return at most a "single matching element" from the array to that is queried by either the positional $ operator form in the "query" portion or the $elemMatch in the "projection" portion.
In order to do this sort of "ranged" operation, you need the aggregation framework which has greater "manipulation" and "filtering" capabilities on arrays:
collection.aggregate(
array(
# First match the "document" to reduce the pipeline
array(
'$match' => array(
array(
'tickets.start' => array(
'$gte' => new MongoDate(strtotime('2015-06-16 00:00:00'))
)
)
)
),
# Then unwind the array
array( '$unwind' => '$tickets' ),
# Match again on the "unwound" elements to filter
array(
'$match' => array(
array(
'tickets.start' => array(
'$gte' => new MongoDate(strtotime('2015-06-16 00:00:00'))
)
)
)
),
# Group back to original structure per document
array(
'$group' => array(
'_id' => '$_id',
'name' => array( '$first' => '$name' ),
'tickets' => array(
'$push' => '$tickets'
)
)
)
)
)
Or you can possibly use the $redact operator to simplify with MongoDB 2.6 or greater which basically uses the $cond operator syntax as it's input:
collection.aggregate(
array(
# First match the "document" to reduce the pipeline
array(
'$match' => array(
array(
'tickets.start' => array(
'$gte' => new MongoDate(strtotime('2015-06-16 00:00:00'))
)
)
)
),
# Redact entries from the array
array(
'$redact' => array(
'if' => array(
'$gte' => array(
array( '$ifNull' => array(
'$start',
new MongoDate(strtotime('2015-06-16 00:00:00'))
)),
new MongoDate(strtotime('2015-06-16 00:00:00:00'))
)
),
'then' => '$$DESCEND',
'else' => '$$PRUNE'
)
)
)
)
So both examples do the "same thing" in "filtering" the elements from the array that "do not" match the conditions specified and return "more than one" element, which is something basic projection cannot do.
You should use Aggregation to get output.
You should use following query:
db.collection.aggregate({
$match: {
name: "array"
}
}, {
$unwind: "$tickets"
}, {
$match: {
"tickets.start": {
$gt: ISODate("2015-06-16")
}
}
}, {
$group: {
"_id": "name",
"tickets": {
$push: "$tickets"
}
}
})
I'm trying to get my head around the complex find conditions of CakePHP and have read the docs but am struggling with this one query.
SELECT field1,
field2
WHERE id = 123456
AND ((holding_date = Last_day(holding_date)
AND Month(holding_date) IN(3, 6, 9, 12))
OR (holding_date = '2013-09-15'))
To produce the above conditions what would my conditions array look like?
CakePHP conditions and sql expressions
While the conditions in the question are not that complex, they touch on a few points which mean they can be tricky to define correctly. Some of the things to know when defining cakephp conditions:
Conditions are defined as an array of key => value pairs, as such the same key cannot be defined twice on the same level
an array element which has a numeric key is interpreted as an sql expression
The default join mode is "AND" - it's not necessary to specify "AND" => ... in conditions
An OR conditions must have more than one elements. There's no error if it has only one but otherwise: OR what?
Bearing in mind the above notes, the conditions in the question can be expressed as:
$foo->find('all', array(
'fields' => array(
'field1',
'field2'
),
'conditions' => array(
'id' => 123456,
'OR' => array(
array(
'holding_date = LAST_DAY(holding_date)',
'MONTH(holding_date)' => array(3,6,9,12)
),
'holding_date' => '2013-09-15'
)
)
));
Which results in:
WHERE
`id` = 123456
AND
(
(
(holding_date = LAST_DAY(holding_date))
AND
(MONTH(holding_date) IN (3, 6, 9, 12)))
)
OR
(`holding_date` = '2013-09-15')
)
Note: whitespace is quite important =) I misread the question originally solely because of the inconsistent whitespace in the question's sql.
OK I have solved it:
$findParams['conditions'] = array(
'Account.client_id' => '12345',
'AND' => array(
'OR' => array(
'Holding.holding_date' => '2013-09-15',
'AND' => array(
'Holding.holding_date = LAST_DAY(Holding.holding_date)',
'MONTH(Holding.holding_date)' => array(3,6,9,12)
)
)
)
);
Try this:
$params['conditions'] = array(
'`id`' => 123456,
'AND' => array(
'`holding_date`' => 'LAST_DAY(`holding_date`)',
'AND' => array(
'MONTH(holding_date)' => array(3, 6, 9, 12),
'OR' => array(`holding_date` => '2013-09-15')
)
)
);
how do I build a find() query in cakePHP using these conditions:
Find where
MyModel.x = 1 and MyModel.y = 2 OR
MyModel.x = 1 and MyModel.y value does not exist (or is equal to empty string)
Can somebody tell me how I can go about building such find query?
I'm gonna give you some pointers, but you need to try to do this as it's very basic and it's always good to practice.
A basic find in cake is in the form of
$this->ModelName->find('all');
This in its default form does a SELECT * from model_names (convention is to have singular ModelName for plural table name - model_names)
To add conditions:
$this->ModelName->find('all', array('conditions' => array('ModelName.x' => 1));
To add AND conditions
$this->ModelName->find('all', array('conditions' => array(
'ModelName.x' => 1, 'ModelName.y' => 2
));
To add OR conditions
$this->ModelName->find('all', array('conditions' => array(
'OR' => array(
'ModelName.x' => 1, 'ModelName.y' => 2
)
));
To combine both
$this->ModelName->find('all', array('conditions' => array(
'ModelName.y is not' => null,
'OR' => array(
'ModelName.x' => 1, 'ModelName.y' => 2
)
));
// where y is not null and (x = 1 or y = 2)
http://book.cakephp.org/1.3/view/1030/Complex-Find-Conditions
(btw I'm sure there will be users giving you the exact answers, so just take my answer for your reference :) )
$this->MyModel->find('all', array('conditions' => array(
'OR' => array(
array(
'MyModel.x' => 1,
'MyModel.y' => 1
),
array(
'MyModle.x' => 1,
'OR' => array(
array('MyModel.y' => NULL),
array('MyModel.y' => '')
)
)
)
)));
Originaly posted on cakephp Q&A but i'll put it up here in hope of getting some answers.
I have a bunch of companies that has a status of 0 as default but sometimes get a higher status. Now i want to use the high status if exists but revert to 0 if not. i have tried a bunch of different approaches but i always get either only the ones with status 0 or the ones with the status i want, never giving me status if exists and 0 if not.
Gives me only the status i specify, not giving me the ones with status 0:
'Company' => array (
'conditions' => array (
'OR' => array(
'Company.status' => 0,
'Company.status' => $status,
)
)
)
Gives me only status of 0:
'Company' => array (
'conditions' => array (
'OR' => array(
'Company.status' => $status,
'Company.status' => 0
)
)
)
Status definition and retrieving data in code:
function getCountry($id = null, $status = null) {
// Bunch of code for retrieving country with $id and all it's companies etc, all with status 0.
$status_less_companies = $this->Country->find...
if ($status) {
$status_companies = $this->Country->find('first', array(
'conditions' => array(
'Country.id' => $id
),
'contain' => array(
'Product' => array (
'Company' => array (
'conditions' => array (
'OR' => array(
'Company.status' => $status,
'Company.status' => 0
)
)
)
)
)
)
}
// Mergin $status_less_companies and $status_companies and returning data to flex application.
}
I changed the name for the models for this question just to make more sense, people are generaly frighten away when i tell them i work with cakephp for my flex application. I guess the logic to this question doesn't make sense but trust me that it makes sense in my application.
Thanks!
Try
'Company' => array (
'conditions' => array (
'OR' => array(
array('Company.status' => 0),
array('Company.status' => $status),
)
)
)
In the cookbook it says to wrap the or conditions in arrays if they are pertaining to the same field
http://book.cakephp.org/2.0/en/models/retrieving-your-data.html#complex-find-conditions
I'm not sure to have understood what results you expect. If you want to retrieve all records having status = 0, plus let's say the one having status = 3, you could use an 'IN' instead of an 'OR'.
In Cake, you would write it like this:
$status = 3;
$conditions = array('Company.status' => array(0, $status));
You can also fetch record by using following method:
put values in an array
e.g. $arr=array(1,2);
$res = $this->Model->find('all', array(
'conditions' =>array('Model.filedname'=>$arr),
'model.id' => 'desc'
));
I hope you will find answer.
$this->loadModel('Color');
$colors = $this->Color->find('all', [
'conditions' => [
'Color.is_blocked' => 0,
'Color.is_deleted' => 0,
'OR' => [
[
'Color.isAdmin' => $user_data['id'],
],
[
'Color.isAdmin' => 0,
]
],
]
]);