I downloaded solr 4.6.1 and I am attempting to update the solr index using the following via command line:
curl http://localhost:8983/solr/update?commit=true -H 'Content-type:application/json' -d '
[{
"id" : "1",
"phoneNumber_ss": [{"foo_ss" : "bar"}]
}]
'
I am using the example schema.xml, which is why i used all the "_ss" fields.
The issue is that when I execute this I get the following response:
{"responseHeader":{"status":400,"QTime":1},"error":{"msg":"Error parsing JSON field value. Unexpected OBJECT_START","code":400}}
This seems to be related to the value specified for phoneNumber_ss field which is an array of objects. If I make the value into an array or an object it works fine, its only when it is an array of objects that the issue occurs.
Any help is much appreciated.
I don't think Solr support storing objects into a multivalued field. You can store it as a array of string. You might also store the object as a string and parse it in your application.
If you have such use case that you want to have all the objects from Solr only, you can follow the steps..
Create a multivalued field for your keys.
Maintain the same order of keys and create another multivalued field for values.
So, you can get the keys and values in same order in different fields. But in this approach you might face problems while updating those multivalued fields. You might want to look here
And finally, you are also missing some syntax in your update statement.
set – set or replace a particular value, or remove the value if null is specified as the new value
add – adds an additional value to a list
Check http://wiki.apache.org/solr/UpdateJSON
Related
So I have three databases - an Oracle one, SQL Server one, and a Postgres one. I have a table that has two columns: name, and value, both are texts. The value is a stringified JSON object. I need to update the nested value.
This is what I currently have:
name: 'MobilePlatform',
value:
'{
"iosSupported":true,
"androidSupported":false,
}'
I want to add {"enableTwoFactorAuth": false} into it.
In PostgreSQL you should be able to do this:
UPDATE mytable
SET MobilePlatform = jsonb_set(MobilePlatform::jsonb, '{MobilePlatform,enableTwoFactorAuth}', 'false');
In Postgres, the plain concatenation operator || for jsonb could do it:
UPDATE mytable
SET value = value::jsonb || '{"enableTwoFactorAuth":false}'::jsonb
WHERE name = 'MobilePlatform';
If a top-level key "enableTwoFactorAuth" already exists, it is replaced. So it's an "upsert" really.
Or use jsonb_set() for manipulating nested values.
The cast back to text works implicitly as assignment cast. (Results in standard format; any insignificant whitespace is removed effectively.)
If the content is valid JSON, the storage type should be json to begin with. In Postges, jsonb would be preferable as it's easier to manipulate, but that's not directly portable to the other two RDBMS mentioned.
(Or, possibly, a normalized design without JSON altogether.)
For ORACLE 21
update mytable
set json_col = json_transform(
json_col,
INSERT '$.value.enableTwoFactorAuth' = 'false'
)
where json_exists(json_col, '$?(#.name == "MobilePlatform")')
;
With json_col being JSON or VARCHAR2|CLOB column with IS JSON constraint.
(but must be JSON if you want a multivalue index on json_value.name:
create multivalue index ix_json_col_name on mytable t ( t.json_col.name.string() );
)
Two of the databases you are using support JSON data type, so it doesn't make sense to have them as stringified JSON object in a Text column.
Oracle: https://docs.oracle.com/en/database/oracle/oracle-database/21/adjsn/json-in-oracle-database.html
PostgreSQL: https://www.postgresql.org/docs/current/datatype-json.html
Apart from these, MSSQL Server also provides methods to work with JSON data type.
MS SQL Server: https://learn.microsoft.com/en-us/sql/relational-databases/json/json-data-sql-server?view=sql-server-ver16
Using a JSON type column in any of the above databases would enable you to use their JSON functions to perform the tasks that you are looking for.
If you've to use Text only then you can use replace to add the key-value pair at the end of your JSON
update dataTable set value = REPLACE(value, '}',",\"enableTwoFactorAuth\": false}") where name = 'MobilePlatform'
Here dataTable is the name of table.
The cleaner and less riskier way would be connect to db using the application and use JSON methods such as JSON.parse in Javascript and JSON.loads in Python. This would give you the JSON object (dictionary in case of Python) to work on. You can look for similar methods in other languages as well.
But i would suggest, if possible use JSON columns instead of Text to store the JSON value wherever possible.
I am asked to enter a stringified json value in a column named show_cast in the format of Release: and Date: but I don't have any idea how to do that.
The table simply contains of three columns a token , time and genre. The time has to be a stringified json.
I tried to simply put that using { and simple : but that doesn't seem to work. They say that {{release:,time:},{release:,date:},,,,} should be converted in stringify and then inserted into the database. I don't know how to do that and I don't see any resource like this out there. To be honest I didn't even know about this until I was given this task.
insert into show_reality values("project_123","{{release:2017,date:04-11},{release:2019,date:12-03}}","Action");
I have done this but I don't think it is a stringified json.
Thanks in Advance.
I'm working with mongoDB, and I used a wrapper mongo/Postegres.
Now, I can find my tables and data.
I want to do some statistics but I can't reach objects that got json type in Postgres.
My problem is that I got all the object in json but I need to separate the fields.
I used this :
CREATE FOREIGN TABLE rents( _id NAME, status text, "from" json )
SERVER mongo_server
OPTIONS (database 'tr', collection 'rents');
The field "from" is an object.
I found something like this :
enter code here
but nothing happened
The error (why a screenshot??) means that the data are not in valid json format.
As a first step, you could define the column as type text instead of json. Then querying the foreign table will probably work, and you can see what is actually returned and why PostgreSQL thinks that this is not valid JSON.
Maybe you can create a view on top of the foreign table that converts the value to valid JSON for further processing.
I'm trying to insert JSON into a Postgresql column who's data type is JSON, but I'm having trouble finding how I can do this. This is as far as I've gotten but it's not correct because it just overwrites it every time, instead of adding a new key pair.
I'm using pg-promise node module to perform these queries. Here's what I have so far:
db.query("UPDATE meditation_database SET completed=$1 WHERE user_id=$2", [{myVar : true}, user_id]);
Also 'myVar' should be updated to the variable value, but instead it treats it as a string. How can I get the actual value of 'myVar' instead of it being treated literally.
Thanks,
I'm trying to insert JSON into a Postgresql column who's data type is JSON, but I'm having trouble finding how I can do this.
By executing this:
db.query("INSERT INTO meditation_database(completed, user_id) VALUES($1, $2)",
[{myVar : true}, user_id]);
Also 'myVar' should be updated to the variable value, but instead it treats it as a string. How can I get the actual value of 'myVar' instead of it being treated literally.
myVar is serialized into JSON as a string, that's the proper JSON format for property names, and is the only format that PostgreSQL will accept.
This is as far as I've gotten but it's not correct because it just overwrites it every time, instead of adding a new key pair.
If you are asking how to update JSON in PostgreSQL, this question has been answered previously, and in great detail: How do I modify fields inside the new PostgreSQL JSON datatype?
Say I have a text field with JSON data like this:
{
"id": {
"name": "value",
"votes": 0
}
}
Is there a way to write a query which would find id and then would increment votes value?
I know i could just retrieve the JSON data update what I need and reinsert updated version, but i wonder is there a way to do this without running two queries?
UPDATE `sometable`
SET `somefield` = JSON_REPLACE(`somefield`, '$.id.votes', JSON_EXTRACT(`somefield` , '$.id.votes')+1)
WHERE ...
Edit
As of MySQL 5.7.8, MySQL supports a native JSON data type that enables efficient access to data in JSON documents.
JSON_EXTRACT will allow you to access a particular JSON element in a JSON field, while JSON_REPLACE will allow you to update it.
To specify the JSON element you wish to access, use a string with the format
'$.[top element].[sub element].[...]'
So in your case, to access id.votes, use the string '$.id.votes'.
The SQL code above demonstrates putting all this together to increment the value of a JSON field by 1.
I think for a task like this you're stuck using a plain old SELECT followed by an UPDATE (after you parse the JSON, increment the value you want, and then serialize the JSON back).
You should wrap these operations in a single transaction, and if you're using InnoDB then you might also consider using SELECT ... FOR UPDATE : http://dev.mysql.com/doc/refman/5.0/en/innodb-locking-reads.html
This is sort of a tangent, but I thought I'd also mention that this is the type of operation that a NoSQL database like MongoDB is quite good at.