This way you don't have to create the whole db structure for every single class type. I usually opt for the middle road and use SQLite together with a JSON serializer.
#Sqlite json how to#
package has support for IBlobSerializer and the test cases show how to use it: The serializer will convert the object into a byte array and it gets stored in place of the object. This changed in version 3.9 in 2015 ( SQLite history )and so there is no need to separate out the JSON data so that you can query using a key. However what was not previously possible was to query this JSON data. It means we are effectively caching an extracted value so that means we can avoid repeated calculation. This means we can create an index on a key extracted from the JSON string. I usually opt for the middle road and use SQLite together with a JSON serializer. It has always been possible to store JSON Data in an SQLite database as JSON data is simply text data. SQLite allows one to create indexes on expressions. Id still argue that using a SQLite database is probably faster.
#Sqlite json update#
With a relational database you can update a single record quickly where as with JSON files you will most likely re-write the whole file. He isnt a coder but understands JSON, so we use the JSON file to save small levels with. Then there is the issue of minor changes to the data. It also provides an option to use transactions to reverse changes in case something goes wrong (think about what happens if the JSON file errors out in the mid way and only writes half of the data).
If you have a lot of data and there are a lot of objects that are shared then a relational database is much more efficient. Var db = new sqlite3.Database( './mydb.sqlite3') exporter = sqliteJson(db) json(sql, options, callback)Įxport JSON from a specified table, and use it in the given callback.Įxample: exporter.It all depends on the use case. The path to an SQLite database or a sqlite3 client instance. API constructor(database)Įxample: const sqliteJson = require( 'sqlite-json') Ĭonst exporter = sqliteJson( 'example.db') database Attaching databases or doing multiple queries will produce an error. Note that currently only a single query is supported. Use the -output option to specify a destination file. Use the key option to return an object with rows keyed to a value from your table. By default, sqlite-json returns lists of JSON objects. Sqlite-json data.db -t myTable | other_program > output.json One can either pass SQL directly to SQLite or use the table, columns and/or where options to contrust a query. Sqlite-json data.db -table myTable -key ID -o output.json Examples sqlite-json data.db -key ID "SELECT ID, name FROM myTable"
Use the key option to return an object with rows keyed to a value from your table.īy default, the cli outputs to stdout. One can either pass SQL directly to SQLite or use the table, columns and/or where options to contrust a query.īy default, sqlite-json returns lists of JSON objects. When SQLite is compiled with the JSON1 extensions it provides builtin tools-for manipulating JSON data stored in the database.-This is a gist showing SQLite return query data as a JSON object. The JSONlite data directory is named jsonlite.data by default, and each json document is. w, -where WHERE clause to add to table query JSONlite sandboxes the current working directory similar to SQLite. c, -columns Comma-delimited list of columns to output (Defaul t: all) Convert Sqlite3 tables to JSON Command line Interface Usage: sqlite-json
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