In my report I have a field tripDate as java.util.GregorianCalendar:
<field name="tripDate" class="java.util.GregorianCalendar"/>
I need to create a JSON datasource and pass this field.
I tried with different kind of solutions such as:
...
"tripDate": "1601897363" // value as timestamp
...
or as Datetime object:
"tripDate": {
"date": "2020-08-12 10:10:10",
"timezone_type": 3,
"timezone": "Europe/Paris"
}
In both cases i get the error:
Unable to get value for JSON field "tripDate" of class java.util.GregorianCalendar
Field "tripDate" is of class java.util.GregorianCalendar and can not be converted.
There is a way to pass a java.util.GregorianCalendar field from JSON datasource?
JSON/JSONQL datasources work with java.util.Date and its subclasses.
So you should use one of those for your textField class.
Regarding parsing of the date/time JSON string, depending on how you feed the JSON to your report you could try:
with a dataAdapter XML file, you can set the date pattern either with Jaspersoft Studio or by hand:
<jsonDataAdapter ...>
...
<datePattern>yyyy-dd-MM hh:mm:ss</datePattern>
...
</jsonDataAdapter>
if you don't use a data adapter and rely only on the net.sf.jasperreports.json.source property, you also need to set this property in your JRXML:
<property name="net.sf.jasperreports.json.date.pattern" value="yyyy-dd-MM hh:mm:ss"/>
In the same manner you could set a pattern for parsing numbers.
Related
Given a table with a column of type jsonb[], how do I insert a json array into the column?
Using the provided formatters :array, :json won't work in this instance - unless I am missing the correct combination or something.
const links = [
{
title: 'IMDB',
url: 'https://www.imdb.com/title/tt0076759'
},
{
title: 'Rotten Tomatoes',
url: 'https://www.rottentomatoes.com/m/star_wars'
}
];
const result = await db.none(`INSERT INTO tests (links) VALUES ($1:json)`, [links]);
You do not need the library's :json filter in this case, as you need an array of JSON objects, and not a JSON with an array of JSON objects.
The former is formatted correctly by default, which then only needs ::json[] type casting:
await db.none(`INSERT INTO tests(links) VALUES($1::json[])`, [links]);
Other Notes
Use pg-monitor or event query to output queries being executed, for easier diagnostics.
Method none can only resolve with null, no point storing the result in a variable.
Library pg-promise does not have any :array filter, see supported filters.
I have an Entity with a String field (storing JSON), and need to compare value from its database column with another value. Problem is that type of this database column is TEXT, but in fact it contains JSON. So, is there a way to write something like this? I.e. I need to compare my value with some field of JSON from TEXT column.
criteriaBuilder.equal(root.get("json_column").customExpressionn(new Expression{
Object handle(Object data){
return ((Object)data).get("json_field")
}
}), value)
Assuming, you have a MySQL server with version > 5.7.x
I just had the same issue. I wanted to find all entities of a class that had a JSON field value inside a JSON object column.
The solution that worked for me was something along the lines (sorry typing from a phone)
(root, query, builder)->{
return builder.equal(
builder.function("JSON_EXTRACT", String.class, root.get("myEntityJsonAttribute"), builder.literal("$.json.path.to.json.field")),
"searchedValueInJsonFieldOfJsonAttribute"
)
}
I have an OData model with some Edm.String fields which represents ABAP NUMC(9) or NUMC(10). All other Edm-Types (like Int32) ends with an error.
Can I now convert these Fields to Integer in SAPUI5? The content is i.e. 0000012345. If I use type in my binding, my text is empty. If I use it without type, the strings are output correctly.
new sap.m.Text({
text: {
path: "{statusData>AnzPdf}",
type: new sap.ui.model.type.Integer()
}
})
Apply formatter as give in example to convert data from model to Integer format.
Let's say I have a Postgres database (9.3) and there is a table called Resources. In the Resources table I have the fields id which is an int and data which is a JSON type.
Let's say I have the following records in said table.
1, {'firstname':'Dave', 'lastname':'Gallant'}
2, {'firstname':'John', 'lastname':'Doe'}
What I want to do is write a query that would return all the records in which the data column has a json element with the lastname equal to "Doe"
I tried to write something like this:
records = db_session.query(Resource).filter(Resources.data->>'lastname' == "Doe").all()
Pycharm however is giving me a compile error on the "->>"
Does anyone know how I would write the filter clause to do what I need?
Try using astext
records = db_session.query(Resource).filter(
Resources.data["lastname"].astext == "Doe"
).all()
Please note that the column MUST have a type of a JSONB. The regular JSON column will not work.
Also you could explicitly cast string to JSON (see Postgres JSON type doc).
from sqlalchemy.dialects.postgres import JSON
from sqlalchemy.sql.expression import cast
db_session.query(Resource).filter(
Resources.data["lastname"] == cast("Doe", JSON)
).all()
If you are using JSON type (not JSONB) the following worked for me:
Note the '"object"'
query = db.session.query(ProductSchema).filter(
cast(ProductSchema.ProductJSON["type"], db.String) != '"object"'
)
I have some GeoJSON in a JSON (not JSONB) type column and none of the existing solutions worked, but as it turns out, in version 1.3.11 some new data casters were added, so now you can:
records = db_session.query(Resource).filter(Resources.data["lastname"].as_string() == "Doe").all()
Reference: https://docs.sqlalchemy.org/en/14/core/type_basics.html#sqlalchemy.types.JSON
Casting JSON Elements to Other Types
Index operations, i.e. those invoked by calling upon the expression
using the Python bracket operator as in some_column['some key'],
return an expression object whose type defaults to JSON by default, so
that further JSON-oriented instructions may be called upon the result
type. However, it is likely more common that an index operation is
expected to return a specific scalar element, such as a string or
integer. In order to provide access to these elements in a
backend-agnostic way, a series of data casters are provided:
Comparator.as_string() - return the element as a string
Comparator.as_boolean() - return the element as a boolean
Comparator.as_float() - return the element as a float
Comparator.as_integer() - return the element as an integer
These data casters are implemented by supporting dialects in order to
assure that comparisons to the above types will work as expected, such
as:
# integer comparison
data_table.c.data["some_integer_key"].as_integer() == 5
# boolean comparison
data_table.c.data["some_boolean"].as_boolean() == True
According sqlalchemy.types.JSON, you can do it like this
from sqlalchemy import JSON
from sqlalchemy import cast
records = db_session.query(Resource).filter(Resources.data["lastname"] == cast("Doe", JSON)).all()
According to this, pre version 1.3.11, the most robust way should be like this, as it works for multiple database types, e.g. SQLite, MySQL, Postgres:
from sqlalchemy import cast, JSON, type_coerce, String
db_session.query(Resource).filter(
cast(Resources.data["lastname"], String) == type_coerce("Doe", JSON)
).all()
From version 1.3.11 onward, type-specific casters is the new and neater way to handle this:
db_session.query(Resource).filter(
Resources.data["lastname"].as_string() == "Doe"
).all()
I want to convert a query string object into a datetime in this format:- "YYYY-mm-dd HH:mm:ss.xxx" in C#.net. But when i am using Convert.ToDateTime(object) for getting the datetime value then an exception is being fired.
Could anyone can provide me the iFormatProvider for the same.?
Thanks
Varun Sareen
Have a look at DateTime.TryParseExact Method
I think your problem is trying to convert the QueryString object, instead of getting a value from the query string and then converting the value.
A QueryString object is a keyed collection of the values specified in a URL from an HTTP request. So if you have a URL like: http://example.com?a=1&b=2&c=3, the request QueryString object will contain three values: 1, 2, and 3. To access the values you would use the keys:
var aValue = Request.QueryString["a"];
And the variable aValue would then contain the string value "1" (without the quotes).
After getting the value from the query string, you can use the TryParseExact method suggested by #astander.