I wish to make call different column if user using different language, example in one collection I have description_en for English and description_ind for Indonesia.
The problem if I concat it is not working.
This is example code
let lang = req.params.lang;
order_status_description:element.orderstatus.description + lang,
this is my complete code
const MyOrderResource = (req,res,next)=>{
let lang = req.params.lang;
let arrayResult = [];
req.order.forEach(element => {
let arrayItem =[];
element.orderitem.forEach(item=>{
arrayItem.push({
_id:item._id,
product_id:item.product_id,
product_name:item.product_name,
description:item.description,
unit:item.unit,
price:item.price,
fprice:'Rp ' + new Intl.NumberFormat().format(item.price),
quantity:item.quantity,
amount:item.amount,
fprice:'Rp ' + new Intl.NumberFormat().format(item.amount),
});
});
arrayResult.push({
_id:element._id,
user_id:element.user_id,
date:element.date,
store_id:element.store_id,
store_name:element.profile[0].name,
store_address:element.profile[0].address,
total:element.total,
ftotal:'Rp ' + new Intl.NumberFormat().format(element.total),
order_status_code:element.orderstatus.code,
order_status_description:element.orderstatus.description + lang,
order_item:arrayItem,
});
});
res.status(201).json({
data:arrayResult,
status : 200,
})
}
module.exports = MyOrderResource;
For this code, I wish to call, column description_en, but the result is undefined
Thanks for helping
You can use something like
order_status_description : element.orderstatus["description" + lang]
In the posted snipet, it instructs to concat the value of key- 'element.orderstatus.description' to the value of key - 'lang'
I want to update a taable from a JSON object. The WHERE clause of the update has more than one columns. I tried this :
connexion.query("update my_table set ? where ?", [{ "param_valeur": emails }, { "param_key": "paramKey", "flotte_id": 1 }], function (err, rows) {
console.log("=================== sql =", this.sql);
if (err)
throw err;
res.send("");
});
but at runtime the WHERE clause does not have the AND keyword ! So how to fix that ?
OK, you want to use dynamic data by sending a json to MySQL WHERE query, from what I found out until now this is not a trivial operation... So, my first answer is not a good solution for your requirements so I write a new and dynamic code. (a little bit more complicated than the first answer...)
Please try the solution and let my know if this is what you want.
my answer is based on https://www.npmjs.com/package/mysql#preparing-queries, you can read this docs section for better understanding of the double question marks syntax.
let paramsSETObj = { "param_valeur": emails };
let paramsWHEREObj = { "param_key": "paramKey", "flotte_id": 1 };
// separate the question marks with comma ', '
let questionMarksForSET = this.getQuestionMarksStr(Object.keys(paramsSETObj).length, ', ');
let valuesForSETArray = this.convertObjectToArray(paramsSETObj);
// separate the question marks with 'AND'
let questionMarksForWHERE = this.getQuestionMarksStr(Object.keys(paramsWHEREObj).length, ' AND ');
let valuesForWHEREArray = this.convertObjectToArray(paramsWHEREObj);
let sql = `UPDATE my_table SET ${questionMarksForSET} WHERE ${questionMarksForWHERE}`;
let inserts = [...valuesForSETArray, ...valuesForWHEREArray];
sql = mysql.format(sql, inserts);
connexion.query(sql, function (err, rows) {
if (err)
throw err;
res.send("");
});
// Convert an object to array, where each key is before the value
module.exports.convertObjectToArray = function (obj) {
let arr = [];
for (let key in obj) {
arr.push(key);
arr.push(obj[key]);
}
return arr;
}
/**
* Get a question marks string separate each pair with the equal sign '='
* the amount of the questions marks pairs is the same as the keys of the object from the request.
* The separator in this case is comma ',' or 'AND' - this is a must for your requirement in the question.
* example:
* questionMarksForSET: ?? = ? , ?? = ?
* questionMarksForWHERE: ?? = ? AND ?? = ?
*/
module.exports.getQuestionMarksStr = function (objKeysLength, separator) {
let questionsMarks = '';
for (let i = 0; i < objKeysLength; i++) {
// if the index is not in the last object key - add the separator else add empty string
let commaOrAndSeparator = (i !== objKeysLength - 1) ? separator : '';
questionsMarks += ' ?? = ? ' + commaOrAndSeparator;
}
return questionsMarks;
}
Try this:
connexion.query('UPDATE my_table SET param_valeur = ? WHERE param_key = ? AND flotte_id = ?', [emails, "paramKey", 1], function (err, rows) {
if (err)
throw err;
res.send("");
});
I'm having trouble to extract values from an excel file with the office.js add in I'm writing.
The add in shall help my colleagues to prepare report sheets for each teacher.
It is supposed to filter the corresponding courses from the master table and send the data to the next processing step (create word files for each teacher).
I've tried filtering ranges with autofilter and creating a table with the data, but it seems that no code is executed after return context.sync()
I've read the official tutorial and some of the code on buildingofficeaddins.com but my function never executes the code after "return context.sync()"
function mselectTeacher(teachers) {
Excel.run(function (context) {
var sheet = context.workbook.worksheets.getActiveWorksheet();
var lfv = sheet.tables.add("A1:M211", true);
var wsy = lfv.columns.getItem("WS/SS");
var studium = lfv.columns.getItem("Studium");
// some more colums
wsy.load("values");
studium.load("values");
return context.sync()
.then(function () {
//I actually want to filter the rows by teacher,
//this is only for testing
for (var i = 1; i < 20; i++) {
console.log(wsy[i] + "," + studium[i]);
}
});
});
}
Is the problem, that I'm calling Excel.run from within another function?
Could you try this?
function mselectTeacher(teachers) {
Excel.run(function (context) {
var sheet = context.workbook.worksheets.getActiveWorksheet();
var lfv = sheet.tables.add("A1:M211", true);
var wsy = lfv.columns.getItem("WS/SS");
var studium = lfv.columns.getItem("Studium");
// some more colums
wsy.load("values");
studium.load("values");
context.sync()
//I actually want to filter the rows by teacher,
//this is only for testing
for (var i = 1; i < 20; i++) {
console.log(wsy[i] + "," + studium[i]);
}
});
}
I tried your code in ScriptLab on excel web and saw "The requested resource doesn't exist"error in F12
I think it's due to no columns named "WS/SS" "Studium" in your new added table. It works after i changed the columns name with "WS/SS" "Studium"
I am wondering how can I achieve pagination using Cassandra.
Let us say that I have a blog. The blog lists max 10 posts per page. To access next posts a user must click on pagination menu to access page 2 (posts 11-20), page 3 (posts 21-30), etc.
Using SQL under MySQL, I could do the following:
SELECT * FROM posts LIMIT 20,10;
The first parameter of LIMIT is offset from the beginning of result set and second argument is amount of rows to fetch. The example above returns 10 rows starting from row 20.
How can I achieve the same effect in CQL?
I have found some solutions on Google, but all of them require to have "the last result from previous query". It works for having "next" button to paginate to another 10-results-set, but what if I want to jump from page 1 to page 5?
You don't need to use tokens, if you are using Cassandra 2.0+.
Cassandra 2.0 has auto paging.
Instead of using token function to create paging, it is now a built-in feature.
Now developers can iterate over the entire result set, without having to care that it’s size is larger than the memory. As the client code iterates over the results, some extra rows can be fetched, while old ones are dropped.
Looking at this in Java, note that SELECT statement returns all rows, and the number of rows retrieved is set to 100.
I’ve shown a simple statement here, but the same code can be written with a prepared statement, couple with a bound statement. It is possible to disable automatic paging, if it is not desired. It is also important to test various fetch size settings, since you will want to keep the memorize small enough, but not so small that too many round-trips to the database are taken. Check out this blog post to see how paging works server side.
Statement stmt = new SimpleStatement(
"SELECT * FROM raw_weather_data"
+ " WHERE wsid= '725474:99999'"
+ " AND year = 2005 AND month = 6");
stmt.setFetchSize(24);
ResultSet rs = session.execute(stmt);
Iterator<Row> iter = rs.iterator();
while (!rs.isFullyFetched()) {
rs.fetchMoreResults();
Row row = iter.next();
System.out.println(row);
}
Try using the token function in CQL:
https://docs.datastax.com/en/cql-oss/3.3/cql/cql_using/useToken.html
Another suggestion, if you are using DSE, solr supports deep paging:
https://cwiki.apache.org/confluence/display/solr/Pagination+of+Results
Manual Paging
The driver exposes a PagingState object that represents where we were in the result set when the last page was fetched:
ResultSet resultSet = session.execute("your query");
// iterate the result set...
PagingState pagingState = resultSet.getExecutionInfo().getPagingState();
This object can be serialized to a String or a byte array:
String string = pagingState.toString();
byte[] bytes = pagingState.toBytes();
This serialized form can be saved in some form of persistent storage to be reused later. When that value is retrieved later, we can deserialize it and reinject it in a statement:
PagingState pagingState = PagingState.fromString(string);
Statement st = new SimpleStatement("your query");
st.setPagingState(pagingState);
ResultSet rs = session.execute(st);
Note that the paging state can only be reused with the exact same statement (same query string, same parameters). Also, it is an opaque value that is only meant to be collected, stored an re-used. If you try to modify its contents or reuse it with a different statement, the driver will raise an error.
Src: https://docs.datastax.com/en/cql-oss/3.3/cql/cql_reference/cqlshPaging.html
If you read this doc "Use paging state token to get next result",
https://datastax.github.io/php-driver/features/result_paging/
We can use "paging state token" to paginate at application level.
So PHP logic should look like,
<?php
$limit = 10;
$offset = 20;
$cluster = Cassandra::cluster()->withContactPoints('127.0.0.1')->build();
$session = $cluster->connect("simplex");
$statement = new Cassandra\SimpleStatement("SELECT * FROM paging_entries Limit ".($limit+$offset));
$result = $session->execute($statement, new Cassandra\ExecutionOptions(array('page_size' => $offset)));
// Now $result has all rows till "$offset" which we can skip and jump to next page to fetch "$limit" rows.
while ($result->pagingStateToken()) {
$result = $session->execute($statement, new Cassandra\ExecutionOptions($options = array('page_size' => $limit,'paging_state_token' => $result->pagingStateToken())));
foreach ($result as $row) {
printf("key: '%s' value: %d\n", $row['key'], $row['value']);
}
}
?>
Although the count is available in CQL, so far I have not seen a good solution for the offset part...
So... one solution I have been contemplating was to create sets of pages using a background process.
In some table, I would create the blog page A as a set of references to page 1, 2, ... 10. Then another entry for blog page B pointing to pages 11 to 20, etc.
In other words, I would build my own index with a row key set to the page number. You may still make it somewhat flexible since you can offer the user to choose to see 10, 20 or 30 references per page. For example, when set to 30, you display sets 1, 2, and 3 as page A, sets 4, 5, 6 as page B, etc.)
And if you have a backend process to handle all of that, you can update your lists as new pages are added and old pages are deleted from the blog. The process should be really fast (like 1 min. for 1,000,000 rows if even that slow...) and then you can find the pages to display in your list pretty much instantaneously. (Obviously, if you are to have thousands of users each posting hundreds of pages... that number can grow quickly.)
Where it becomes more complicated is if you wanted to offer a complex WHERE clause. By default a blog shows you a list of all the posts from the newest to the oldest. You could also offer lists of posts with tag Cassandra. Maybe you want to inverse the order, etc. That makes it difficult unless you have some form of advanced way to create your index(es). On my end I have a C-like language which goes and peek and poke to the values in a row to (a) select them and if selected (b) to sort them. In other words, on my end I can already have WHERE clauses as complex as what you'd have in SQL. However, I do not yet break up my lists in pages. Next step I suppose...
Using cassandra-node driver for node js (koa js,marko js) : Pagination
Problem
Due to the absence of skip functionality, we need to work around. Below is the implementation of manual paging for node app in case of anyone can get an idea.
code for simple users list
navigate between next and previous page states
easy to replicate
There are two solutions which i am going to state here but only gave the code for solution 1 below,
Solution 1 : Maintain page states for next and previous records (maintain stack or whatever data structure best fit)
Solution 2 : Loop through all records with limit and save all possible page states in variable and generate pages relatively to their pageStates
Using this commented code in model, we can get all states for pages
//for the next flow
//if (result.nextPage) {
// Retrieve the following pages:
// the same row handler from above will be used
// result.nextPage();
//}
Router Functions
var userModel = require('/models/users');
public.get('/users', users);
public.post('/users', filterUsers);
var users = function* () {//get request
var data = {};
var pageState = { "next": "", "previous": "" };
try {
var userCount = yield userModel.Count();//count all users with basic count query
var currentPage = 1;
var pager = yield generatePaging(currentPage, userCount, pagingMaxLimit);
var userList = yield userModel.List(pager);
data.pageNumber = currentPage;
data.TotalPages = pager.TotalPages;
console.log('--------------what now--------------');
data.pageState_next = userList.pageStates.next;
data.pageState_previous = userList.pageStates.previous;
console.log("next ", data.pageState_next);
console.log("previous ", data.pageState_previous);
data.previousStates = null;
data.isPrevious = false;
if ((userCount / pagingMaxLimit) > 1) {
data.isNext = true;
}
data.userList = userList;
data.totalRecords = userCount;
console.log('--------------------userList--------------------', data.userList);
//pass to html template
}
catch (e) {
console.log("err ", e);
log.info("userList error : ", e);
}
this.body = this.stream('./views/userList.marko', data);
this.type = 'text/html';
};
//post filter and get list
var filterUsers = function* () {
console.log("<------------------Form Post Started----------------->");
var data = {};
var totalCount;
data.isPrevious = true;
data.isNext = true;
var form = this.request.body;
console.log("----------------formdata--------------------", form);
var currentPage = parseInt(form.hdpagenumber);//page number hidden in html
console.log("-------before current page------", currentPage);
var pageState = null;
try {
var statesArray = [];
if (form.hdallpageStates && form.hdallpageStates !== '') {
statesArray = form.hdallpageStates.split(',');
}
console.log(statesArray);
//develop stack to track paging states
if (form.hdpagestateRequest === 'next') {
console.log('--------------------------next---------------------');
currentPage = currentPage + 1;
statesArray.push(form.hdpageState_next);
pageState = form.hdpageState_next;
}
else if (form.hdpagestateRequest === 'previous') {
console.log('--------------------------pre---------------------');
currentPage = currentPage - 1;
var p_st = statesArray.length - 2;//second last index
console.log('this index of array to be removed ', p_st);
pageState = statesArray[p_st];
statesArray.splice(p_st, 1);
//pageState = statesArray.pop();
}
else if (form.hdispaging === 'false') {
currentPage = 1;
pageState = null;
statesArray = [];
}
data.previousStates = statesArray;
console.log("paging true");
totalCount = yield userModel.Count();
var pager = yield generatePaging(form.hdpagenumber, totalCount, pagingMaxLimit);
data.pageNumber = currentPage;
data.TotalPages = pager.TotalPages;
//filter function - not yet constructed
var searchUsers = yield userModel.searchList(pager, pageState);
data.usersList = searchUsers;
if (searchUsers.pageStates) {
data.pageStates = searchUsers.pageStates;
data.next = searchUsers.nextPage;
data.pageState_next = searchUsers.pageStates.next;
data.pageState_previous = searchUsers.pageStates.previous;
//show previous and next buttons accordingly
if (currentPage == 1 && pager.TotalPages > 1) {
data.isPrevious = false;
data.isNext = true;
}
else if (currentPage == 1 && pager.TotalPages <= 1) {
data.isPrevious = false;
data.isNext = false;
}
else if (currentPage >= pager.TotalPages) {
data.isPrevious = true;
data.isNext = false;
}
else {
data.isPrevious = true;
data.isNext = true;
}
}
else {
data.isPrevious = false;
data.isNext = false;
}
console.log("response ", searchUsers);
data.totalRecords = totalCount;
//pass to html template
}
catch (e) {
console.log("err ", e);
log.info("user list error : ", e);
}
console.log("<------------------Form Post Ended----------------->");
this.body = this.stream('./views/userList.marko', data);
this.type = 'text/html';
};
//Paging function
var generatePaging = function* (currentpage, count, pageSizeTemp) {
var paging = new Object();
var pagesize = pageSizeTemp;
var totalPages = 0;
var pageNo = currentpage == null ? null : currentpage;
var skip = pageNo == null ? 0 : parseInt(pageNo - 1) * pagesize;
var pageNumber = pageNo != null ? pageNo : 1;
totalPages = pagesize == null ? 0 : Math.ceil(count / pagesize);
paging.skip = skip;
paging.limit = pagesize;
paging.pageNumber = pageNumber;
paging.TotalPages = totalPages;
return paging;
};
Model Functions
var clientdb = require('../utils/cassandradb')();
var Users = function (options) {
//this.init();
_.assign(this, options);
};
Users.List = function* (limit) {//first time
var myresult; var res = [];
res.pageStates = { "next": "", "previous": "" };
const options = { prepare: true, fetchSize: limit };
console.log('----------did i appeared first?-----------');
yield new Promise(function (resolve, reject) {
clientdb.eachRow('SELECT * FROM users_lookup_history', [], options, function (n, row) {
console.log('----paging----rows');
res.push(row);
}, function (err, result) {
if (err) {
console.log("error ", err);
}
else {
res.pageStates.next = result.pageState;
res.nextPage = result.nextPage;//next page function
}
resolve(result);
});
}).catch(function (e) {
console.log("error ", e);
}); //promise ends
console.log('page state ', res.pageStates);
return res;
};
Users.searchList = function* (pager, pageState) {//paging filtering
console.log("|------------Query Started-------------|");
console.log("pageState if any ", pageState);
var res = [], myresult;
res.pageStates = { "next": "" };
var query = "SELECT * FROM users_lookup_history ";
var params = [];
console.log('current pageState ', pageState);
const options = { pageState: pageState, prepare: true, fetchSize: pager.limit };
console.log('----------------did i appeared first?------------------');
yield new Promise(function (resolve, reject) {
clientdb.eachRow(query, [], options, function (n, row) {
console.log('----Users paging----rows');
res.push(row);
}, function (err, result) {
if (err) {
console.log("error ", err);
}
else {
res.pageStates.next = result.pageState;
res.nextPage = result.nextPage;
}
//for the next flow
//if (result.nextPage) {
// Retrieve the following pages:
// the same row handler from above will be used
// result.nextPage();
//}
resolve(result);
});
}).catch(function (e) {
console.log("error ", e);
info.log('something');
}); //promise ends
console.log('page state ', pageState);
console.log("|------------Query Ended-------------|");
return res;
};
Html side
<div class="box-footer clearfix">
<ul class="pagination pagination-sm no-margin pull-left">
<if test="data.isPrevious == true">
<li><a class='submitform_previous' href="">Previous</a></li>
</if>
<if test="data.isNext == true">
<li><a class="submitform_next" href="">Next</a></li>
</if>
</ul>
<ul class="pagination pagination-sm no-margin pull-right">
<li>Total Records : $data.totalRecords</li>
<li> | Total Pages : $data.TotalPages</li>
<li> | Current Page : $data.pageNumber</li>
</ul>
</div>
I am not very much experienced with node js and cassandra db, this solution can surely be improved. Solution 1 is working example code to start with the paging idea. Cheers
a detailed blog.
Our use case was similar. Pull everything from a Cassandra table (cassandra does it smartly by fetching ~5000 in one go and return a cursor), heavy personalized processing on each row, and keep going. Once our iteration reaches close to 5000, it again fetches the next chunk of 5000 rows internally and adds it to the result cursor. It does it so brilliantly that we don’t even feel this magic happening behind the scene.
but It became a bottleneck for us.As iterating over the chunk took some time and till it reached the end of the chunk, Cassandra thought the connection was not being used and closed the connection automatically yelling, its timeout. So we implemented with page state.
from cassandra.cluster import Cluster
from cassandra.auth import PlainTextAuthProvider
from cassandra.query import SimpleStatement
# connection with cassandra
cluster = Cluster(["127.0.0.1"], auth_provider=PlainTextAuthProvider(username="pankaj", password="pankaj"))
session = cluster.connect()
# setting keyspace
session.set_keyspace("my_keyspace")
# set fetch size
fetch_size = 100
# It will print first 100 records
next_page_available = True
paging_state = None
data_count = 0
while next_page_available is True:
# fetches a new chunk with given page state
result = fetch_a_fresh_chunk(paging_state)
paging_state = results.paging_state
for result in results:
# process payload here.....
# payload processed
data_count += 1
# once we reach fetch size, we stop cassandra to fetch more chunk, internally
if data_count == fetch_size:
i = 0
break
# fetches a fresh chunk with given page state
def fetch_a_fresh_chunk(paging_state = None)
query = "SELECT * FROM my_cute_cassandra_table;"
statement = SimpleStatement(query, fetch_size = fetch_size)
results = session.execute(statement, paging_state=paging_state)
I'm new in CRM development. I know a basic thing like "best practice for crm 2011"
I wanna understand now how to work with lookup fields. And I think I chose the easiest way for my self.
I have an costum entity "contract" it has 5 more field, 2 of these are lookups.
First lookup (agl_contractId) - it is a link by it self
Second lookup (agl_ClientId) - link to Client.
What do I need?
When I choose fill First lookup (agl_contractId), script should find in this contract a Client and copy-past it to current form.
I've done script but it isn't work... (((
function GetAccountFromContract()
{
XrmServiceToolkit.Rest.Retrieve(Xrm.Page.getAttribute("agl_osnovnoy_dogovorid").getValue(),
'agl_osnovnoy_dogovoridSet',
null,null,
function (result) {
var Id = Xrm.Page.getAttribute("agl_osnovnoy_dogovorid").getValue();
if (result.Id != null) {
var LookupData = new Array();
var LookupItem = new Object();
var lookuptextvalue = lookupvalue[0].name;
var lookupid = lookupvalue[0].id;
var lokupType = lookupvalue[0].entityType;
alert(lookupvalue);
alert(lookupData);
Xrm.Page.getAttribute("agl_accountid").setValue(lookupData);
}
},
function (error) {
equal(true, false, error.message);
},
false
);
}
If I understand you well: When you select Contract in agl_osnovnoy_dogovorid field, you want to pull Client property from that Contract and put it in agl_accountid field?
If that is right:
First, get Id of selected Contract (from agl_osnovnoy_dogovorid field)
var selectedContract = new Array();
selectedContract = Xrm.Page.getAttribute("agl_osnovnoy_dogovorid").getValue();
{
var guidSelectedContract = selectedContract[0].id;
//var name = selectedContract[0].name;
//var entType = selectedContract[0].entityType;
}
Second, retrieve Client from agl_osnovnoy_dogovorid. Your oData query will be like:
http://crmserver/org/XRMServices/2011/OrganizationData.svc/ContractSet(guid'" + guidSelectedContract + "')/CustomerId
(In example I'm using CustomerId field. For your case enter Schema Name of Client field).
Now, execute query and put result into agl_accountid field:
$.getJSON(
Xrm.Page.context.getServerUrl() + "/XRMServices/2011/OrganizationData.svc/ContractSet(guid'" + guidSelectedContract + "')/CustomerId",
function(data){
if(data.d.CustomerId != null && data.d.CustomerId.Id != null && data.d.CustomerId.Id != "undefined")
{
//set agl_accountid field
Xrm.Page.getAttribute("agl_accountid").setValue([{id:data.d.CustomerId.Id, name:data.d.CustomerId.Name, typename:data.d.CustomerId.LogicalName}]);
}
});
Your using REST to retrieve data but also using FetchXml example to setup the agl_accoutid lookup.
Also some of the conditions are not clear … anyway … I’ve incorporated the change to your original post.
function GetAccountFromContract()
{
var aodLookupValue = Xrm.Page.getAttribute("agl_osnovnoy_dogovorid").getValue();
if (!aodLookupValue) return;
XrmServiceToolkit.Rest.Retrieve( aodLookupValue[0].id ,
'agl_osnovnoy_dogovoridSet', null,null,
function (result) {
var customer = result.d["your attribute name"];
if (customer) {
var LookupData = new Array();
var LookupItem = new Object();
var lookuptextvalue = customer.Name;
var lookupid = customer.Id;
var lokupType = customer.LogicalName;
alert(lookupvalue);
alert(lookupData);
Xrm.Page.getAttribute("agl_accountid").setValue(lookupData);
}
},
function (error) {
equal(true, false, error.message);
}, false );
}