I am trying to use the JSON array to create a quasar table but I am not able to link the array data with the table data.
I have stored the data from my database into an array called "scanResults" and the result is as shown:
console.log(scanResults);
Results of scanResults
Among the three arrays (Items, Count, and ScannedCount), I only want the data from Items. Is there a way I could put the data from scanResults into tableData under data() in the section such that I will be able to display the data into the quasar table?
tableData: [
{
name: 'xxx',
frequency: 'xxx',
prescription: 'xxx',
time: 'xxx'
}
]
<q-table
title="Reminders"
no-data-label="You do not have any reminders yet!"
align="center"
:columns="columns"
:data="tableData"
row-key="name"
selection="single"
:selected.sync="selected"
/>
If I am reading your scanResults correctly, you can set
tableData = scanResults.0[1]
to put the contents of the second place (the data) of the first array ("0") into tableData.
Did you define the columns array? The bindings must include both arrays so that QTable knows which data to put in which column. See the script tab of the "basic" section at https://quasar.dev/vue-components/table .
Related
What I'm doing:
I'm reading csv which contains data like townships, religions and so on. In the csv, they are text values. But of course in my table in the database, they are foreign_key. So to insert those, I need to map those text values to id.
It is possible to get the id like below.
const { townshipId } = await models.Township.findOne({
where: { name: township },
attributes: ["townshipId"],
raw: true,
});
The problem:
But the problem what I think is that those findOne(s) will be populated in my entire method because I have like 50 other properties besides township.
What I'm trying
I'm trying to pass township-name to a getter method, expecting its equivalent townshipId.
I found out that it is possible to use getter and setter in sequelize. But I don't find how to pass parameters to those.
My question
Am I trying the correct way to import the csv data? How can I use getters (and setters) with parameters in sequelize?
Maybe if you want to exclude columns from the result, you pass the "attributes" field like:
attributes: { exclude: ['field1','field2'] }
This way you wont show the columns "field1" and "field2" in the result.
I have wrote a code like below to concatenate two arrays together and save them as a JSON file.
In this code, "seg" is an array of some number, which has been produced somewhere in my code. info is also an array containing some data following by "Seg" array.
Defining variable types:
seg: Array<any> = [];
info: Array<any>=[];
final: Array<{info:any, Seg:any}>=[];
push value in array and concatenate them together:
this.info.push({date_created: 25 , description: 'aaa', year:'2015'});
this.final.push({info: this.info ,Seg:this.seg});
this.file.writeFile(this.file.externalApplicationStorageDirectory, 'test.json', JSON.stringify(this.final));
the produced file is something like this:
[{"info":[{"date_created: 25 , "description"="aaa", "year" :"2015"}],"seg":[2,3,4,5]}]
As you can see, the info information is placed between two bracket, so JSON file consider it as a list, not record.
Does anyone knows , how can I remove this brackets from the info array sides?
Should change the type of variable from array to anything else?
You can use like this to store as a record
seg: Array<any> = [];
info: Array<any>=[];
final:{info:any, Seg:any};
this.final.Seg = this.seg;
this.final.info = this.info;
function updateFirebase(){
const fb=firebase.database().ref()
//get field values
author = document.getElementById('uname').value
user_email = document.getElementById('umail').value
data = {author, user_email}
//update database
fb.child('Article/').update(data);
}
</script>
I have problem with my code. I want to update the data inside a table named "Article". Article has generated items with a unique key/id and each key has its own content. Lets say I want to be able to edit the "author" or change the "title", the problem is they each have a randomly generated key/id that I cant access. for example that "-LS39kReBHrKGqNj7h_". I can only save the data inside the "Article" tree but I cant change the "author" or the "title". How do i get a workaround this so I can change those properties?
Here is how my firebase looks like
It depends whether you have the record reference on the frontend before update or not (whether you have fetched it before you are trying to update it).
But generally, you have two options
You can store the key reference as an "id" field on the object.
To achieve that, you need two step process when creating the record at the first place
// Creates a new record in DB and returns it to you. Now you can get the "key"
const newRecord = firebase.database().ref('TABLE_NAME_REF').push();
newRecord.set({
id: newRecord.key
...
});
This is great if you fetch the list of records on the frontend and then you want to update one of them. Then you can just build the ref path like this
fb.child('Article/' + record.id ).update(data); // where record is the prefetched thing
You need to find the element based on its fields first. And once you have it, you can update it right away.
To achieve this, you can simply do something like:
firebase.database()
.ref('TABLE_NAME_REF') // let's say 'Article'
.orderByChild('RECORD_KEY') // Let's say 'author'
.equalTo('KEY_VALUE') // let's say 'zoranm'
.limitToFirst(1)
.once("value")
.then(res => {
// You need to loop, it always returns an array
res.forEach(record => {
console.log(record.key); // Here you get access to the "key"
fb.child('Article/' + record.key ).update(data); // This is your code pasted here
})
})
Inside my database model, I've got a json field which has the following structure:
json_field: {"data"=>{"key_1"=>"value1", "key_2"=>"value"} }
Trying to query this using select:
Model.select(:id, "json_field -> 'data'")
Model.select(:id, "json_field -> 'data' as data")
yields the array of objects, but without the json field selected.
#<ActiveRecord::Relation [#<Model id: 1, Model id: 2 ...>]
Thanks for any help.
This:
#<ActiveRecord::Relation [#<Model id: 1, Model id: 2 ...>]
is the result of calling inspect on the query and inspect will only display columns that the model knows about it. The model will query the table for the columns during startup so it will only know about columns that are actually in the table.
ActiveRecord creates column accessor methods on the fly using method_missing so it can create methods things in a query that aren't columns in the actual table.
So your data is there, you just have to ask for it by name, for example:
Model.select(:id, "json_field -> 'data' as data").map(&:data)
will give you the data values.
I am building a CSV file parser through node and Angular . so basically a user upload a csv file , on my server side which is node the csv file is traversed and parsed using node-csv
. This works fine and it returns me an array of object based on csv file given as input , Now on angular end I need to display two table one is csv file data itself and another is cross tabulation analysis. I am facing problem while rendering data, so for a table like
I am getting parse responce as
For cross tabulation we need data in a tabular form as
I have a object array which I need to manipulate in best possible way so as to make easily render on html page . I am not getting a way how to do calculation on data I get so as to store cross tabulation result .Any idea on how should I approach .
data json is :
[{"Sample #":"1","Gender":"Female","Handedness;":"Right-handed;"},{"Sample #":"2","Gender":"Male","Handedness;":"Left-handed;"},{"Sample #":"3","Gender":"Female","Handedness;":"Right-handed;"},{"Sample #":"4","Gender":"Male","Handedness;":"Right-handed;"},{"Sample #":"5","Gender":"Male","Handedness;":"Left-handed;"},{"Sample #":"6","Gender":"Male","Handedness;":"Right-handed;"},{"Sample #":"7","Gender":"Female","Handedness;":"Right-handed;"},{"Sample #":"8","Gender":"Female","Handedness;":"Left-handed;"},{"Sample #":"9","Gender":"Male","Handedness;":"Right-handed;"},{"Sample #":";"}
There are many ways you can do this and since you have not been very specific on the usage, I will go with the simplest one.
Assuming you have an object structure such as this:
[
{gender: 'female', handdness: 'lefthanded', id: 1},
{gender: 'male', handdness: 'lefthanded', id: 2},
{gender: 'female', handdness: 'righthanded', id: 3},
{gender: 'female', handdness: 'lefthanded', id: 4},
{gender: 'female', handdness: 'righthanded', id: 5}
]
and in your controller you have exposed this with something like:
$scope.members = [the above array of objects];
and you want to display the total of female members of this object, you could filter this in your html
{{(members | filter:{gender:'female'}).length}}
Now, if you are going to make this a table it will obviously make some ugly and unreadable html so especially if you are going to repeat using this, it would be a good case for making a directive and repeat it anywhere, with the prerequisite of providing a scope object named tabData (or whatever you wish) in your parent scope
.directive('tabbed', function () {
return {
restrict: 'E',
template: '<table><tr><td>{{(tabData | filter:{gender:"female"}).length}}</td></tr><td>{{(tabData | filter:{handedness:"lefthanded"}).length}}</td></table>'
}
});
You would use this in your html like so:
<tabbed></tabbed>
And there are ofcourse many ways to improve this as you wish.
This is more of a general data structure/JS question than Angular related.
Functional helpers from Lo-dash come in very handy here:
_(data) // Create a chainable object from the data to execute functions with
.groupBy('Gender') // Group the data by its `Gender` attribute
// map these groups, using `mapValues` so the named `Gender` keys persist
.mapValues(function(gender) {
// Create named count objects for all handednesses
var counts = _.countBy(gender, 'Handedness');
// Calculate the total of all handednesses by summing
// all the values of this named object
counts.Total = _(counts)
.values()
.reduce(function(sum, num) { return sum + num });
// Return this named count object -- this is what each gender will map to
return counts;
}).value(); // get the value of the chain
No need to worry about for-loops or anything of the sort, and this code also works without any changes for more than two genders (even for more than two handednesses - think of the aliens and the ambidextrous). If you aren't sure exactly what's happening, it should be easy enough to pick apart the single steps and their result values of this code example.
Calculating the total row for all genders will work in a similar manner.