I have a string set on one of my DynamoDB tables.
This code adds a new item to the string set and works great
$update = $client->updateItem ( array (
'TableName' => 'myTable',
'Key' => array (
'rep_num' => array (
'S' => $id_num
)
),
'ExpressionAttributeValues' => array (
':transaction_ids' => array(
'SS' => array($transaction_id)
)
),
'UpdateExpression' => 'ADD transaction_ids :transaction_ids'
));
My problem is, it only works if the key transaction_ids already exists on an item.
How can I change this code to also create the key on an existing item if one doesn't exist?
If the item doesn't have the transaction_ids, it should create the attribute and add the value to it.
If the item has the attribute transaction_ids, it should add the value to it as long as the data type of new value matches with the existing SS attribute data type.
Refer this link
If the existing data type is a set, and if Value is also a set, then
Value is appended to the existing set. For example, if the attribute
value is the set [1,2], and the ADD action specified [3], then the
final attribute value is [1,2,3]. An error occurs if an ADD action is
specified for a set attribute and the attribute type specified does
not match the existing set type.
Both sets must have the same primitive data type. For example, if the
existing data type is a set of strings, Value must also be a set of
strings.
I have tested with JavaScript API. It works as expected. It should work in PHP as well.
Sample code:-
UpdateExpression : "ADD #transaction_ids :transaction_ids ",
ExpressionAttributeNames: {
'#transaction_ids' : 'transaction_ids',
},
ExpressionAttributeValues: {':transaction_ids' : docClient.createSet(["3"])},
Related
I was successful in deleting documents using other fields but could not delete using "_id" field. The PHP page says that the id should be a string (which it is by default), but what I was trying to do is, giving an id of my own which is an integer, and am doing the following:
This is my document structure:
$document = array (
'_id' => new MongoInt32(1),
'cust_id' => 'abc124'
)
This is how I am trying to delete:
$collection->remove(array('_id' => new MongoId(1)), true);
But this is giving me an error. PHP php manual says:
"To remove a document based on its ID, you need to ensure that you pass the ID as a MongoID object rather than just a string:"
But my id is a int and I cant figure out the process to delete the document referenced by the id.
Your help would be appreciated. Thank You.
You've used a normal integer (MongoInt32) as _id field. And MongoInt32 is not the same as MongoID. They are two different classes. You are suppose to delete it with:
$collection->remove( array( '_id' => new MongoInt32(1) ) );
Additional Information:
MongoId is used as value for an _id field if you don't set a value yourself, such as with:
$collection->insert( array( 'cust_id' => 'abc124' ) );
If you retrieve this document, and var_dump() that you will see:
array(2) {
'_id' =>
class MongoId#6 (1) {
public $$id =>
string(24) "51ee74e944670a09028d4fc9"
}
'cust_id' =>
string(6) "abc124"
}
The note in the docs mean that you can't remove that document now with:
$collection->remove( array( '_id' => '51ee74e944670a09028d4fc9' ) );
But instead you will need to use:
$collection->remove( array( '_id' => new MongoID( '51ee74e944670a09028d4fc9' ) ) );
As last point I'd like to raise that you don't really have to use new MongoInt32(1) in the first place, you can just use:
$document = array (
'_id' => 1,
'cust_id' => 'abc124'
);
You only need MongoInt32/MongoInt64 in case you're on a 32-bit platform (or Windows) and need to deal with large numbers.
This should work:
$collection->deleteOne( array( '_id' => new MongoDB\BSON\ObjectId ($_id )) );
"To remove a document based on its ID, you need to ensure that you pass the ID as a MongoID object rather than just a string:"
Normally what the PHP manual states is true but not for you. You have changed the type of your _id to something other than an ObjectId (aka a MongoId).
With this in mind you need to search by that other object which is a MongoInt32:
$db->collection->remove(array('_id'=>new MongoInt32(1)))
I'm using CodeIgniter framework for the easyappointments.org library. I'm trying to update the field data through the id of a row. Actually this is my code for the update:
return $this->db
->update('ea_appointments', $appointment)
->where('ea_appointments.id', $appointment_id);
The problem's that the update method need two parameter (table to update, associative array with the fields name column of db). In my above function I pass only the $appointment_id, so the variable $appointment is empty and doesn't contain any associative array. I want to know how to update only the field data to 1. And remain the other field in the same value condition.
This is the structure of the table:
id|book|start|end|notes|hash|unavailable|provider|data
Logic example:
previous condition row:
id => 0
book => example
start => 18/10/2015
end => 19/10/2015
notes => empty
hash => akdjasldja
unavailable => false
provider => 5
data => 0
I pass in the function $appointment_id with 0 value. I'm waiting this new result:
id => 0
book => example
start => 18/10/2015
end => 19/10/2015
notes => empty
hash => akdjasldja
unavailable => false
provider => 5
data => 1
So the main problem is retrieve first the all field value of the specific row and later update? Or something like this. Could someone help me?
In my above function I pass only the $appointment_id, so the variable
$appointment is empty and doesn't contain any associative array.
If you simply want to update the column data to 1 for appointment_id 0 then pass in an array with data for the key and 1 for the value.
$appointment_id = 0;
$appointment = array('data' => 1);
$this->db->where('id', $appointment_id);
$this->db->update('ea_appointments', $appointment);
In my controller I have the following lines
$request = Yii::$app->request;
print_r($request->post());
echo "version_no is ".$request->post('version_no',-1);
The output is given below
Array
(
[_csrf] => WnB6REZ6cTAQHD0gAkoQaSsXVxB1Kh5CbAYPDS0wOGodSRANKBImVw==
[CreateCourseModel] => Array
(
[course_name] => test
[course_description] => kjhjk
[course_featured_image] =>
[course_type] => 1
[course_price] => 100
[is_version] => 1
[parent_course] => test
[version_no] => 1
[parent_course_id] => 3
[course_tags] => sdsdf
)
)
version_no is -1
So here the return value of post() contains the version_no.But when it is called as $request->post("version_no"), it is not returning anything (or $request->post("version_no",-1) returns the default value -1).
As per Yii 2.0 docs, the syntax is correct and should return the value of post parameter.
But why is it failing in my case.The post array has the parameter in it.But the function is not returning when called for an individual parameter value.
your parameters are in $_POST['CreateCourseModel']['version_no'] etc. with $request->post('version_no',-1) you trying to get $_POST['version_no'] which is not defined so it returns you -1. So to get version_no use
$data = $request->post('CreateCourseModel');
print_r($data['version_no']);
You can access nested $_POST array elements using dot notation:
\Yii::$app->request->post('CreateCourseModel.version_no', -1);
Model properties are grouped like that for massive assignment that is done via $model->load(Yii::$app->request->post()).
Depending on your needs maybe it's better use default value validator like that:
['version_no', 'default', 'value' => -1],
The Problem/How
Pass angularJS the array result of a query that includes many joins.
Using angularJS to sort with ui-sortable reorders the dataset when sorting.
Pass data back to PHP and use synchronizeWithArray to save back (creates a collection).
Doctrine doesn't like receiving the data of the collection back in a different order than it outputs.
** If all I change are values - without reordering elements it saves with no problems.
Update: http://www.doctrine-project.org/jira/browse/DC-346
Noticed it was an old bug they never fixed, is there anything to still do what I want?
Details
$model = Doctrine_Core::getTable('TableName')->findOneById(...);
$model->synchronizeWithArray(array);
$model->save();
Doctrine (1.2) / mysql throws an Integrity error, duplicate primary key id = 2 - it is trying to change the id field.
When I reorder the elements with ui-sortable, it moves the arrays within 'Fields' around while also updating the 'position' value.
This is example data:
The problem would be array 0 and array 1 swap places - causing doctrine to cause primary key error as it tries to change the ids over.
array( // the root of the array is part of one table
id => 1001,
label => 'xxx',
Fields => array( // related table data
0 => array(
id => 1,
position => 0,
name => 'item1'
),
1 => array(
id => 2,
position => 1,
name => 'item2'
),
2 => array(
id => 3,
position => 2,
name => 'item3'
),
3 => array(
id => 4,
position => 3,
name => 'item4'
)
)
)
Well I guess we could either look on the Doctrine side and try to fix this bug, or make it work with the way Doctrine operates. The second option is probably easier.
Why don't you just save the order of the data, and put it back in that order before feeding it back to doctrine? One way to do that would be in angular. Where ever you get the array of data in angular, call saveOrder(), and before feeding it back, call reOrder():
var order = {};
function saveOrder(data)
{
for(var key in data)
{
if(data.hasOwnProperty(key))
{
order[data[key].id] = key;
}
}
}
function reOrder(data)
{
var ordered = [];
for(var key in data)
{
if(data.hasOwnProperty(key))
{
ordered[order[data[key].id]] = data[key];
}
}
return ordered;
}
After filtering some data, i created a variable $customers. This variable is a simple array
which has the following values:
array(
(int) 1 => 'Customer1',
(int) 2 => 'Customer2',
(int) 3 => 'Customer3'
)
I passed this array from the controller to the view like this
$this->set('customers', $customers);
In the view i use this array in a form so that the user can select one
echo $this->Form->input('customer_id', array('options' => array($customers)));
The data which is displayed in the select form is this 'Customer1', 'Customer2', 'Customer3'
Eveyting works ok so far.
Now, after the user has submited the data, i want to do some further logic in the controller. I want to take the data which the user has selected and save it in a second table. So i do this:
$this->Invoice->set('secondtabel', $this->request->data['Invoice']['customer_id']);
The data is being saved in the second table, but the problem is saves the value '1', '2', '3' not the name of the customer. How can i save the name of the customer and not the identifier number from the array.
Please bear with me, i am new to cakephp and to php in general.
I assume this is actually a problem with your HTML, your select box likely looks something like this:
<select name="customer_id">
<option value="1">Customer1</option>
<option value="2">Customer2</option>
<option value="3">Customer3</option>
</select>
This is why your values are 1, 2 or 3 and not Customer1 etc, because $this->request->data['Invoice']['customer_id'] is equal to 1, 2 or 3 etc.
My suggestion would be to fix this at the root of the problem, and I think that by only passing the values into your select box, you should get HTML like this:
<option>Customer1</option>
... which will mean that $this->request->data['Invoice']['customer_id'] will equal Customer1 etc.
So, try this: (array_values will return an array only containing the values, essentially stripping the keys)
$this->set('customers', array_values($customers));
This should fix your problem. However, as far as structured data goes, the way you are currently doing it (storing 1, 2 or 3 etc) is actually the correct way to do this. This way, you simply join the customers table when you are retrieving this data, and you can grab the name that way... Something like this:
$invoices = $this->Invoice->find('all', array(
'conditions' => array(
// your custom find conditions
),
'joins' => array(
array(
'table' => 'customers',
'alias' => 'Customer',
'type' => 'LEFT',
'conditions' => array('Customer.id = Invoice.customer_id')
)
),
'fields' => array(
'Invoice.*', // retrieve regular invoice data
'Customer.name' // retrieve the joined customer name too
)
));
This way you still store a customer ID as an integer, and simply look up the name with SQL when you go to retrieve that data.
A possible reason why you might want to do it simply by storing the customer's name as text is that you want to store the customers name as it appears at the time, meaning if it changes in the future, previous invoices with that name attached won't change with it because that name is stored in text rather than a numeric reference to another table containing a name that has changed.
Hope this helps.
Docs
http://php.net/array_values