openPilotLog/docs/man/man3/experimental_ADatabase.3

.TH "experimental::Database" 3 "Sun Dec 27 2020" "openPilotLog" \" -*- nroff -*-
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.SH NAME
experimental::Database \- The DB class encapsulates the SQL database by providing fast access to hot database data\&.  

.SH SYNOPSIS
.br
.PP
.PP
\fC#include <database\&.h>\fP
.PP
Inherits QObject\&.
.SS "Signals"

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.RI "void \fBdataBaseUpdated\fP ()"
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.RI "updated is emitted whenever the database contents have been updated\&. This can be either a commit, update or remove\&. This signal should be used to trigger an update to the models of the views displaying database contents in the user interface so that a user is always presented with up-to-date information\&. "
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.SS "Public Member Functions"

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.RI "\fBDatabase\fP (const \fBDatabase\fP &)=delete"
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.RI "void \fBoperator=\fP (const \fBDatabase\fP &)=delete"
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.RI "bool \fBconnect\fP ()"
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.RI "Connect to the database and populate database information\&. "
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.RI "void \fBdisconnect\fP ()"
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.RI "closes the database connection\&. "
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.RI "QVector< QString > \fBcustomQuery\fP (QString statement, int return_values)"
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.RI "Can be used to send a complex query to the database\&. "
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.RI "bool \fBexists\fP (\fBAEntry\fP entry)"
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.RI "Checks if an entry exists in the database, based on position data\&. "
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.RI "bool \fBexists\fP (\fBDataPosition\fP data_position)"
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.RI "bool \fBcommit\fP (\fBAEntry\fP entry)"
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.RI "commits an entry to the database, calls either insert or update, based on position data "
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.RI "bool \fBinsert\fP (\fBAEntry\fP new_entry)"
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.RI "Create new entry in the databse based on \fBUserInput\fP\&. "
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.RI "bool \fBupdate\fP (\fBAEntry\fP updated_entry)"
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.RI "Updates entry in database from existing entry tweaked by the user\&. "
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.RI "bool \fBremove\fP (\fBAEntry\fP entry)"
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.RI "deletes an entry from the database\&. "
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.RI "bool \fBremoveMany\fP (QList< \fBDataPosition\fP >)"
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.RI "deletes a list of entries from the database\&. Optimised for speed when deleting many entries\&. "
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.RI "TableData \fBgetEntryData\fP (\fBDataPosition\fP data_position)"
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.RI "retreive entry data from the database to create an entry object "
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.RI "\fBAEntry\fP \fBgetEntry\fP (\fBDataPosition\fP data_position)"
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.RI "retreive an Entry from the database\&. "
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.RI "\fBAPilotEntry\fP \fBgetPilotEntry\fP (RowId row_id)"
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.RI "retreives a PilotEntry from the database\&. "
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.RI "\fBATailEntry\fP \fBgetTailEntry\fP (RowId row_id)"
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.RI "retreives a TailEntry from the database\&. "
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.RI "\fBAAircraftEntry\fP \fBgetAircraftEntry\fP (RowId row_id)"
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.RI "retreives a TailEntry from the database\&. "
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.RI "\fBAFlightEntry\fP \fBgetFlightEntry\fP (RowId row_id)"
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.RI "retreives a flight entry from the database\&. "
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.RI "const QStringList \fBgetCompletionList\fP (\fBDatabaseTarget\fP)"
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.RI "getCompletionList returns a QStringList of values for a QCompleter based on database values "
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.RI "const QHash< QString, int > \fBgetIdMap\fP (\fBDatabaseTarget\fP)"
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.RI "returns a QHash<QString, int> of a human-readable database value and its row id\&. Used in the Dialogs to map user input to unique database entries\&. "
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.RI "int \fBgetLastEntry\fP (\fBDatabaseTarget\fP)"
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.RI "returns the ROWID for the newest entry in the respective database\&. "
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.RI "QList< int > \fBgetForeignKeyConstraints\fP (int foreign_row_id, \fBDatabaseTarget\fP target)"
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.RI "returns a list of ROWID's in the flights table for which foreign key constraints exist\&. "
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.SS "Static Public Member Functions"

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.RI "static \fBDatabase\fP * \fBgetInstance\fP ()"
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.RI "static QSqlDatabase \fBdatabase\fP ()"
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.RI "Can be used to access the database connection\&. "
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.SS "Public Attributes"

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.RI "\fBDatabaseError\fP \fBlastError\fP"
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.SH "Detailed Description"
.PP 
The DB class encapsulates the SQL database by providing fast access to hot database data\&. 
.SH "Member Function Documentation"
.PP 
.SS "QVector< QString > experimental::Database::customQuery (QString statement, int return_values)"

.PP
Can be used to send a complex query to the database\&. 
.PP
\fBParameters\fP
.RS 4
\fIquery\fP - the full sql query statement 
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\fIreturnValues\fP - the number of return values 
.RE
.PP

.SS "QSqlDatabase experimental::Database::database ()\fC [static]\fP"

.PP
Can be used to access the database connection\&. 
.PP
\fBReturns\fP
.RS 4
The QSqlDatabase object pertaining to the connection\&. 
.RE
.PP

.SS "\fBAAircraftEntry\fP experimental::Database::getAircraftEntry (RowId row_id)"

.PP
retreives a TailEntry from the database\&. This function is a wrapper for DataBase::getEntry(DataPosition), where the table is already set and which returns an \fBAAircraftEntry\fP instead of an \fBAEntry\fP\&. It allows for easy access to an aircraft entry with only the RowId required as input\&. 
.SS "\fBAFlightEntry\fP experimental::Database::getFlightEntry (RowId row_id)"

.PP
retreives a flight entry from the database\&. This function is a wrapper for DataBase::getEntry(DataPosition), where the table is already set and which returns an \fBAFlightEntry\fP instead of an \fBAEntry\fP\&. It allows for easy access to a flight entry with only the RowId required as input\&. 
.SS "\fBAPilotEntry\fP experimental::Database::getPilotEntry (RowId row_id)"

.PP
retreives a PilotEntry from the database\&. This function is a wrapper for DataBase::getEntry(DataPosition), where the table is already set and which returns a PilotEntry instead of an Entry\&. It allows for easy access to a pilot entry with only the RowId required as input\&. 
.SS "\fBATailEntry\fP experimental::Database::getTailEntry (RowId row_id)"

.PP
retreives a TailEntry from the database\&. This function is a wrapper for DataBase::getEntry(DataPosition), where the table is already set and which returns a TailEntry instead of an Entry\&. It allows for easy access to a tail entry with only the RowId required as input\&. 

.SH "Author"
.PP 
Generated automatically by Doxygen for openPilotLog from the source code\&.