I'm trying to add php array to MongoDB document
{
"_id" : ObjectId("51b043e1d07a4e9e06000004"),
"comments" : {
"count" : 0,
"array" : []
}
}
array:
$array = array(
"user_id" => $comment["user_id"],
"text" => $comment["text"]
);
Using this:
$this->database->Collection->update(array("_id" => new MongoId($comment["object_id"])), array('$push' => $array);
However, it doesn't seem to work and I can't find why. I don't know MongoDb well yet... Thanks
The value of the $push needs to be another PHP array with a key that names the array field to update and a value that's the element to add. So in this case it would be:
$this->database->Collection->update(
array("_id" => new MongoId($comment["object_id"])),
array('$push' => array("comments.array" => $array)));
Related
I realize there are a number of questions about multidimensional arrays and foreach loops, and I have spent hours reading through them and trying to get my own loop to work -- without success. If the solution is a duplicate, I'll remove my question (or link to another if that is preferred).
Now, the challenge:
Using an array of returned MYSQL results. The results are from multiple joined tables in an associative array. Now I need to convert it to the multidimensional array I need.
I've got most of it working, but my issue is looping through and adding new items to the right place in the array.
Here's some code:
//example of how array is setup in the way I want, this part works.
foreach($results as $i => $a):
//some other code is here, see below.
$items[$i] = [
"id" => $a['id'],
"itemid" => $a['itemid'],
"name" => $a['name'],
"def" => $a['def'],
"class" => $a['class'],
"timeline" => $a['timeline'],
"files" => [
[0] => [
"id" => $a['fileid'],
"name" => $a['filename'],
"path" => $a['filepath'],
"type" => $a['filetype']
]
],
"tags" => [
[0] => [
"id" => $a['tagid'],
"name" => $a['tagname']
]
]
];
endforeach;
Then I've tried a number of ways to loop through in order to only add to the 'tags' or 'files' if the item 'id' is the same as the last. Here is the current code in my editor, not working:
//inside foreach loop, before above code
if($items[$i-1]['id'] == $a['id']):
//it is the same item, works to here.
if(in_array($a['filename'], $items[$i-1], FALSE)):
//add to files array for last item
$items[$i-1]['files'][] = [
"id" => $a['fileid'],
"name" => $a['filename'],
"path" => $a['filepath'],
"type" => $a['filetype']
];
elseif(in_array($a['tagname'], $items[$i-1], FALSE)):
//add to tags array for last item
$items[$i-1]['tags'][] = [
"id" => $a['tagid'],
"name" => $a['tagname']
];
endif;
else:// else it does the code above
As you can see, my most recent attempt was to use in_array, which I now realize doesn't work on multidimensional arrays. My issue is that I can't figure out how to determine if its a new file or new tag for the same item.
Ultimately, I want an array of 'items' which have multiple 'files' and 'tags.' I'm going to json_encode and use it with JS afterwards.
Any advice on how to get this working or optimize it, would be greatly appreciated.
P.S. As I mentioned above, I know this question has been asked before -- though I wasn't able to get their solutions working for me. I'll remove this question if the solution is a duplicate (as in, it's not really helpful to others). Thank you for any help, it is greatly appreciated!
Don't use "autoincrementing" array indices as they easily get messed up. Use your database id since it's already there:
//example of how array is setup in the way I want, this part works.
foreach($results as $i => $a):
$items[$a['id']] = [ // THIS CHANGED.
"id" => $a['id'],
"itemid" => $a['itemid'],
...
Now, with any further result, you can easily check, if the id is already in your array:
if (isset($items[$a['id']])) {
// We had this id before, just add files/tags to it.
// Check first, if files subarray exists, if not: create it.
if (!isset($items[$a['id']]['files'])) {
$items[$a['id']]['files'] = array();
}
$items[$a['id']]['files'][] = array(...); // add the new file.
// Repeat for tags.
}
If your result could return the same file more than once for an id, you can check if the filename is already in there by using a search function:
$filename = $a['filename'];
if (!searchFilename($filename, $items[$a['id']]['files']) {
// Filename is not in there, yet.
// Add file info.
}
function searchFilename($id, $array) {
foreach ($array as $key => $val) {
if ($val['filename'] === $id) {
return true;
}
}
return false;
}
Same applies to tags in a similar way.
In the end, if you do not want the ids for index of $items, just call:
$items = array_values($items);
I have a COLLECTION collflokks in MongoDB, sample Document is :-
{
"_id" : "b_8AUL",
"f_name" : "Pizza. Hut",
"f_lat" : "22.7523513",
"f_lng" : "75.9225847",
"c_uid" : "33",
"f_type" : NumberLong(3),
"members" : [
"42",
"43"
]
}
Within the "members" array , I want to add Arrays like {id:42,name:Mark} , {id:43,name:Hughes}
Currently i'm adding just ids(eg.42,43). I'm only concerned about the new data as it will have new ids .Please suggest.
Earlier I was using this code to push into the members Array:
$flokkCollection = 'collFlokks';
$flokkCollection->update(
array("_id" => $f_handle),
array('$push' => array("members" => $u_id))
);
Well if what you are asking here is "replacing your existing data" then you need to "loop" the results from the collection and "replace" the array content that exists with your new format.
There are likely smarter ways to approach this, but you are not really giving us all the required information in your question, so I can only answer in the basic terms.
Presuming you have:
$required = array(
array(array("id" => "42"), array("name" => "Mark")),
array(array("id" => "43"), array("name" => "Hughes"))
);
As input, then you do something like this:
function myMapper($v) {
return $v["id"];
}
$mapped = array_map("myMapper",$required);
foreach( $mapped as $value) {
$filtered = array_values(
array_filter($required,function($k) {
return $k["id"] == $value;
})
)[0];
collection.update(array(
array("members" => $value),
array('$set' => array(
"members.$" => $filtered
))
));
}
Which should use the positional $ operator to find the matched "position" of the array element by the value used in the "query" portion of the update statement, then in the "update" portion of that statement $set that current array index to the new value at the "filtered" content index from the original input array.
Outside of PHP. We call these inner elements "objects" and not "arrays" which is a PHP notation trait. Key/value things are "objects" and "lists" are "arrays".
I am trying to update() a specific single array in a collection, but while it works fine with $push parameter on a single, specific array, it does not work with a $set parameter.
I don't quite understand logic behind that, because when I use such an example of $pushing the element:
$post_comment = array('$push' =>
array("comments" => array(
"_id" => new MongoId(),
"comment" => htmlspecialchars($_POST['comment']),
"author" => $user->username,
"date" => new MongoDate()
)
)
);
$entries->update(array(
"_id" => $_GET["id"]), $post_comment);
It gives me an array in a MongoDB database which looks more or less like this (with four items pushed in, respectively) :
{
"_id" : "css-clearfix-explained",
"comments" : [
{
"_id" : ObjectId("540cc940af105b19133c9869"),
"comment" : "aaa",
"author" : "maciejsitko",
"date" : ISODate("2014-09-07T21:08:16.215Z")
},
{
"_id" : ObjectId("540cc943af105b19133c986a"),
"comment" : "bbb",
"author" : "maciejsitko",
"date" : ISODate("2014-09-07T21:08:19.542Z")
},
{
"_id" : ObjectId("540cc946af105b19133c986b"),
"comment" : "ccc",
"author" : "maciejsitko",
"date" : ISODate("2014-09-07T21:08:22.968Z")
}
]
}
Which is basically what I want to have, and logically, works fine according to the documentation. But when I try the same with $set as for to edit an individual comment, in the similar fashion as shown:
$edit_comment = array('$set' =>
array("comments" => array(
"_id" => new MongoId($_POST['cmt-id']),
"comment" => htmlspecialchars($_POST['edit-comment']),
"author" => $user->username,
"date" => new MongoDate()
)
)
);
$entries->update(array(
"_id" => $_GET["id"]), $edit_comment);
It outputs four different arrays in place of the previous arrays, to illustrate that, i'll show what happened when I updated first comment "aaa" to "ddd" :
{
"_id" : "css-clearfix-explained",
"comments" : {
"_id" : ObjectId("540cc940af105b19133c9869"),
"comment" : "ddd\r\n ",
"author" : "maciejsitko",
"date" : ISODate("2014-09-07T21:12:10.833Z")
}
}
All the four array elements were pretty much erased and in their place appeared four fields as four independent array elements.
How come? Shouldn't it just work just fine like the example with $push above?
You didn't specify an index within comments. Therefore, $set replaced the array comments with the associated array supplied.
If you want to update a comment, then change your query in the first argument to match a comment by a unique field. Ex, date. In the second argument use a positional $ operator.
Example:
$edit_comment = array('$set' =>
array("comments.$" => array(
"_id" => new MongoId($_POST['cmt-id']),
"comment" => htmlspecialchars($_POST['edit-comment']),
"author" => $user->username,
"date" => new MongoDate()
)
)
);
// this assumes the post date is unique. On second though use something else.
$query = array( "_id" => $_GET["id"], "comments.date" => $_POST['post-date'])
$entries->update( $query, $edit_comment);
Check this out for more info and better explanation:
MongoDB - $set to update or push Array element
I would like to add an array to within an existing array.
I am tryin to use array_push which works as long as i dont try to assign a key to the array (if i try to add a key i get a syntax error... :-()
This is my initial array:
$ResultArray = array(
"TransactionDate" => "$TransactionDate",
"tx"=>array(
"0"=>array(
"TxIndex" => "$TxIndex",
"value" => "$Value",
"PaymentConfirmedCount" => "$PaymentConfirmedCount"
),
"1"=>array(
"TxIndex" => "$TxIndex",
"value" => "$Value",
"PaymentConfirmedCount" => "$PaymentConfirmedCount"
)
)
);
i would then like to add:
$ArrayTOAdd = array(
"0"=>array(
"TxIndex" => "$TxIndex",
"value" => "$Value",
"PaymentConfirmedCount" =>
"$PaymentConfirmedCount"
)
);
if I try:
array_push($ResultArray->tx, $ArrayTOAdd);
BUT this does not work and results in a warning of "array_push() [function.array-push]: First argument should be an array"
if i try this :
array_push($ResultArray, $ArrayTOAdd);
it just adds the array but not to $ResultArray->tx
Any suggestions would be greatly welcomed!
You have to access the element in the array with $ResultArray["tx"] and not $ResultArray->tx. The second one is for the access to members in a php class. So an
array_push($ResultArray["tx"], $ArrayTOAdd);
should work.
In php I'm willing to check the existence of indexes that match with another values in array.
$indexes = array("index", "id", "view");
$fields = array(
"index" => 5,
"id" => 7,
"form" => 10,
"date" => 10,
);
MY ideal result is, in this case, to get "form" and "date". Any idea?
Try
$fields_keys = array_keys($fields);
$fields_unique = array_diff($fields_keys, $indexes);
The result will be an array of all keys in $fields that are not in $indexes.
You can try this.
<?php
$indexes = array("index", "id", "view");
$fields = array(
"index" => 5,
"id" => 7,
"form" => 10,
"date" => 10,
);
$b = array_diff(array_keys($fields), $indexes);
print_r($b);
You can use array_keys function to retrieve keys of a array
Eg:
$array = array(0 => 100, "color" => "red");
print_r(array_keys($array));
Outputs
Array
(
[0] => 0
[1] => color
)
PHP Documentation
Your question is a little unclear but I think this is what you're going for
array_keys(array_diff_key($fields, array_fill_keys($indexes, null)));
#=> Array( 0=>"form", 1=>"date" )
See it work here on tehplayground.com
array_keys(A) returns the keys of array A as a numerically-indexed array.
array_fill_keys(A, value) populates a new array using array A as keys and sets each key to value
array_diff_key(A,B) returns an array of keys from array A that do not exist in array B.
Edit turns on my answer got more complicated as I understood the original question more. There are better answers on this page, but I still think this is an interesting solution.
There is probably a slicker way than this but it will get you started:
foreach(array_keys($fields) as $field) {
if(!in_array($field, $indexes)) {
$missing[] = $field;
}
}
Now you will have an array that holds form and date.