I see that this question is old, but for anyone interested, a similar question was asked and one answer looks viable https://stackoverflow.com/a/30830429/132610 Conversation : { id: 123, members: [ user_id1, user_id2 ] } Message { conversationId: 123, author: user_2, body: ‘Hi what’s up’ } Message { conversationId: 123, author: user_1, body: ‘Whanna ask some question … Read more
If you are looking for a way to create a data model to communicate your design, there are no tools out there specifically created to model json-structured data. However, you could use UML tools or XML design tools to create your models. I’ve been less than satisfied with both methods, but it’s all I have … Read more
The error message pops up when none of the schemas in your search_path can be found. Either it is misconfigured. What do you get for this? SHOW search_path; Or you deleted the public schema from your standard system database template1. You may have been connected to the wrong database when you ran drop schema public … Read more
For ignoring this error when having extra fields while data loading, set strict to False in your meta dictionary. class User(Document): email = StringField(required=True, unique=True) password = StringField() meta = {‘strict’: False}
You can probably do it from the command line without using files: pg_dump -U user –schema=”fromschema” database | sed ‘s/fromschmea/toschema/g’ | psql -U user -d database Note that this searches and replaces all occurrences of the string that is your schema name, so it may affect your data.
To export keyspace schema: cqlsh -e “DESC KEYSPACE user” > user_schema.cql To export entire database schema: cqlsh -e “DESC SCHEMA” > db_schema.cql To import schema open terminal at ‘user_schema.cql’ (‘db_schema.cql’) location (or you can specify the full path) and open cqlsh shell. Then use the following command to import keyspace schema: source ‘user_schema.cql’ To import … Read more
rake db:rollback STEP=1 Is a way to do this, if the migration you want to rollback is the last one applied. You can substitute 1 for however many migrations you want to go back. For example: rake db:rollback STEP=5 Will also rollback all the migration that happened later (4, 3, 2 and also 1). To … Read more
Did you already use EntityTypeConfiguration in EF6? I think the solution would be use mapping for entities on OnModelCreating method in DbContext class, something like this: using System; using Microsoft.EntityFrameworkCore; using Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal; using Microsoft.Extensions.Options; namespace AdventureWorksAPI.Models { public class AdventureWorksDbContext : Microsoft.EntityFrameworkCore.DbContext { public AdventureWorksDbContext(IOptions<AppSettings> appSettings) { ConnectionString = appSettings.Value.ConnectionString; } public String ConnectionString { … Read more
Yes, it is possible. To change the schema of a database object you need to run the following SQL script: ALTER SCHEMA NewSchemaName TRANSFER OldSchemaName.ObjectName Where ObjectName can be the name of a table, a view or a stored procedure. The problem seems to be getting the list of all database objects with a given … Read more
I would query the information_schema – this has views that are much more readable than the underlying tables. SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE COLUMN_NAME LIKE ‘%create%’