i want to filter results from my array using php
my array 1
{
"id": 23,
"name": "nectarine",
"lactose": "Moderate"
},
{
"id": 27,
"name": "peach, white",
"lactose": "None"
},
this is my array 2
{
"0": "None",
"4": "Moderate"
}
i want to get None results and Moderate results seperatly from array 1,
this is my current set ,
how can i do this. pls advice
Create two new arrays: "none" and "moderate" and iterate through array1 and push the id of each into the respective new arrays based on the value associated with "lactose". This will give you two arrays with only the ids of those items in each category and you can then use that to identify the name of each using the original array. Not sure how array two figures into the story, but this will give you a way of separating the items of array1 based on the lactose content. I can post the code required if you are still stuck. but you should try doing it yourself to learn about array_push() and other php stuff.
Related
How do I access webm->max in this Steam API? It's the order [{ that confuses me, array of one before object? I'm not quite sure about the targeting here..
I've tried:
$gameTrailer = $game_json->57690->data->movies[0]->webm->max;
and
$gameTrailer = $game_json['57690']['data']['movies']['webm']['max'];
The API text is like this:
"movies": [{
"id": 2029441,
"name": "Tropico 4 Gameplay Trailer",
"thumbnail": "http:\/\/cdn.akamai.steamstatic.com\/steam\/apps\/2029441\/movie.293x165.jpg?t=1447358847",
"webm": {
"480": "http:\/\/cdn.akamai.steamstatic.com\/steam\/apps\/2029441\/movie480.webm?t=1447358847",
"max": "http:\/\/cdn.akamai.steamstatic.com\/steam\/apps\/2029441\/movie_max.webm?t=1447358847"
},
"highlight": true
}],
and "movies" lies within:
{"57690": {
"data": {
Assume I'll always want the very first movie in an array (which in this case is an array of one). Thanks in advance.
Correct syntax:
$game_json->{57690}->data->movies[0]->webm->max
When you have an object with a numeric key, you have to wrap the key name by curly brackets (Numeric keys are not valid property names).
If you use the associative option:
json_decode( $data, True );
your second attempt is almost right. Simply add the correct index after movie:
$gameTrailer = $game_json['57690']['data']['movies'][0]['webm']['max'];
Hi i'm really mongodb newbie.
I have a document like this:
{
"_id": ObjectId("53182e32e4b0feedb1dea751"),
"solutions": [
[
{
"solution": "Double Room Economy (Without Breakfast)",
"board": "Room Only",
"id": "HK-15501871",
"price": 5000,
"available": "1",
"CXL": "[]",
"unique": 0
},
{
"solution": "Double Room Economy (With Breakfast)",
"board": "Room Only",
"id": "HK-15501871",
"price": 4600,
"available": "1",
"CXL": "[]",
"unique": 1
},
{
"solution": "Double Room Economy (Room Only)",
"board": "Room Only",
"id": "HK-15501871",
"price": 5500,
"available": "1",
"CXL": "[]",
"unique": 2
}
]
]
}
And i need to update the field CXL inside the second array of solutions.
so solutions.1.CXL
This is how i take document:
$collection = $this->getCollection();
$query = array("_id"=>new MongoId($id));
$document = $collection->findOne($query);
now i need to update that field without touch the other.
How can i do?
Thanks!
SOLVED THANKS TO #Sammaye
i solved in this way:
$collection->update(
array('_id' => new MongoId('..')),
array('$set' => array('solutions.0.1.CXL' => 'something'))
);
Edit
To actually update by the first index then you can do:
$db->collection->update(
['_id' => new \MongoId($id)],
['$set' => ['solutions.0.1.CLX' => 'whatever']]
);
I misread the question in posting the information below:
So what you wanna update all CXL fields in the document (since you are only searching by top level document _id)?
That isn't possible without manually pulling this document out and iterating the subdocuments in the solutions field and then resaving it.
This is becausde there is currently no way of saying, "Update all that match"
This, however, is most likely the JIRA you would want to look for: https://jira.mongodb.org/browse/SERVER-1243
As long as you know you are going to update the second element then use the index of the array to do so. But that problem next. First you need the $set operator in order not to blow away your document and just set the field value:
db.collection.update(
{ _id: ObjectId("53182e32e4b0feedb1dea751") },
{ $set: { "solutions.0.1.CXL": [ 1, 2, 3 ] } }
)
If you just want to add to the array rather than replace the whole thing, then just use $push instead:
db.collection.update(
{ _id: ObjectId("53182e32e4b0feedb1dea751") },
{ $push: { "solutions.0.1.CXL": 4 } }
)
If you are paying attention to the notation, then you will notice that the array index values are present in the field to be updated. There is a very good reason for this, which can be read on the documentation for the positional $ operator.
The issue is that you have a nested array, which as the documentation refers to, causes a problem if you try to match items within that nested array. That problem is, if you try to use the "positional" operator to find the matched index of something you look for in a query, then it will contain the value of the first array index match that it finds.
In this case that would be your "top level" array and the "found" index is 0 and not 1 as you may expect.
Please be aware of this issue if you intend to use nested arrays.
You can update like this:
update({
_id: ObjectId("53182e32e4b0feedb1dea751"),
solutions.id: HK-15501871,
solutions.CLX: "Whatever!",")
},{
$set: {"comments.$.type": abc}
}, false, true
);
You may want to go through this once
http://docs.mongodb.org/manual/reference/method/db.collection.update/
I have a key in my document whose structure is as follow:
"tag": [
{
"schemeName": "http:\/\/somesite.com\/categoryscheme2",
"name": "Test Tag2",
"value": 1,
"slug": "test_tag2"
},
{
"schemaName": "http:\/\/somesite.com\/categoryscheme3",
"name": "Test Tag3",
"value": 1,
"slug": "test_tag3"
}
]
Now, I get inputs as tag=test_tag2ANDtest_tag3. How can I write a query for this?
I tried to iterate through the loop but I didnt got any results.
Correct me if I am wrong but you don't need an $and or $elemMatch, instead:
$mongodb->collection->find(array('tags.slug'=>array(
'$in' => array('test_tag2','test_tag3'))))
Should work, however, if your English suggests what a second read does, then you can also use $all in place of $in. This will ensure that all root documents must have those slugs in them.
use $elemMatch operator to match elements inside the array.
I want to use the data from array A (below), but only when the item ID from array A does NOT match an ID from items in array B (also, below). How would I go about comparing these two JSON array's by the key of ID (from items) via PHP? I imagine I first need to convert them with json_decode, but I'm not sure where to go after that?
Please note that array B has more nests ("items", "something", & "posts"), unlike array A. I want to compare the ID from items, not posts.
Array A:
{
"data": [{
"category": "Games",
"id": "45345"
},
{
"category": "Music",
"id": "345345345"
},
{
"category": "Food",
"id": "1"
},
{
"category": "Pets",
"id": "13245345"
}]
}
Array B:
{
"data": {
"something": "blah",
"posts": [{
"id": "34241",
"title": "orange"
}],
"items": [{
"id": "1",
"name": "orange"
},
{
"id": "2",
"name": "dog"
},
{
"id": "3",
"name": "cat"
},
{
"id": "4",
"name": "apple"
}]
}
}
With the case above, it would run through array A and output everything from array A except for the third item, since the id of that item (1) matches one of the id's in array B items.
Based on my understanding, you need a two step process. The first is extracting the ids from the first JSON blob, and the second is filtering the second JSON blob. So basically, we have map and filter. And it just so happens we can use PHP's inbuilt functions for this:
$ids = array_map(
function($value) {
return $value['id'];
},
$array2['data']['items']
);
First, we flatten the second array's items element into the individual ids. We "map" over the data.items array, and return the $id attribute of each array. Now, we have an array of ids...
$new = array_filter(
$array1['data'],
function($var) use ($ids) {
return !in_array($var['id'], $ids);
}
);
Now, we use that to filter the first blobs array to determine if an element is new or not. So we use array filter to handle it for us. All we need to do is check the $ids array to see if the current data's id is there (and if it is, throw it away). So we want to filter the array to be only variables that are not in array of $ids (hence !in_array($var['id'], $ids)...)
Decode the items into PHP arrays. Use a SPL like array_diff() to get the results of a diff comparison.
Referances to get you started:
http://www.php.net/manual/en/function.array-diff.php
http://php.net/manual/en/function.array-diff-key.php
http://www.php.net/manual/en/function.json-decode.php
Should be about what your looking for
I have a MongoDB object of following structure:
{
"_id": ObjectId("4f5ed7d33c9059a00d000002"),
"data":
{
"0": "data1",
"1": "data2",
"2": "data3",
"3": "data4",
}
}
I am using the following code to retrieve sliced result:
$obj1 = $collection->findOne(array('_id' => new MongoId('4f5ed7d33c9059a00d000002')),array('_id'=>1,'data'=>array('$slice' =>2 )));
But the result of this query does not retain array indexes of array data.
You can use the $slice operator to retrieve a subrange of elements in an array.
What you are trying to slice is a document (subdocument). Arrays use fixed positions for the elements, [0..(numelements-1)] so there's no way to keep the "indexes". Unfortunately php's equivalent of a document is an associative array hence the confusion.