Changes between Version 3 and Version 4 of TracReports


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Timestamp:
May 20, 2020, 11:06:14 PM (4 months ago)
Author:
trac
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  • TracReports

    v3 v4  
    3030
    3131== Changing Report Numbering ==
    32 There may be instances where you need to change the ID of the report, perhaps to organize the reports better. At present this requires changes to the trac database. The ''report'' table has the following schema ''(since 0.10)'':
     32There may be instances where you need to change the ID of the report, perhaps to organize the reports better. At present this requires changes to the trac database. The ''report'' table has the following schema:
    3333 * id integer PRIMARY KEY
    3434 * author text
     
    4747Clicking on one of the report results will take you to that ticket. You can navigate through the results by clicking the ''Next Ticket'' or ''Previous Ticket'' links just below the main menu bar, or click the ''Back to Report'' link to return to the report page.
    4848
    49 You can safely edit any of the tickets and continue to navigate through the results using the ''!Next/Previous/Back to Report'' links after saving your results, but when you return to the report, there will be no hint about what has changed, as would happen if you were navigating a list of tickets obtained from a query (see TracQuery#NavigatingTickets). ''(since 0.11)''
     49You can safely edit any of the tickets and continue to navigate through the results using the ''!Next/Previous/Back to Report'' links after saving your results, but when you return to the report, there will be no hint about what has changed, as would happen if you were navigating a list of tickets obtained from a query (see TracQuery#NavigatingTickets).
    5050
    5151== Alternative Download Formats ==
     
    6969
    7070''Creating a custom report requires a comfortable knowledge of SQL.''
     71
     72'''Note that you need to set up [TracPermissions#Reports permissions] in order to see the buttons for adding or editing reports.'''
    7173
    7274A report is basically a single named SQL query, executed and presented by
     
    107109}}}
    108110
    109 ---
     111Dynamic variables can also be used in the report title and description (since 1.1.1).
    110112
    111113== Advanced Reports: Dynamic Variables ==
     
    146148}}}
    147149
    148 
    149 ----
    150150
    151151
     
    155155specialized SQL statements to control the output of the Trac report engine.
    156156
    157 == Special Columns ==
     157=== Special Columns ===
    158158To format reports, TracReports looks for 'magic' column names in the query
    159159result. These 'magic' names are processed and affect the layout and style of the
     
    164164 * '''id''' — same as '''ticket''' above when '''realm''' is not set
    165165 * '''realm''' — together with '''id''', can be used to create links to other resources than tickets (e.g. a realm of ''wiki'' and an ''id'' to a page name will create a link to that wiki page)
     166   - for some kind of resources, it may be necessary to specify their ''parent'' resources (e.g. for ''changeset'', which ''repos'') and this can be achieved using the '''parent_realm''' and '''parent_id''' columns
    166167 * '''created, modified, date, time''' — Format cell as a date and/or time.
    167168 * '''description''' — Ticket description field, parsed through the wiki engine.
     
    193194</div>
    194195}}}
    195  * '''`__style__`''' — A custom CSS style expression to use for the current row.
     196 * '''`__style__`''' — A custom CSS style expression to use on the `<tr>` element of the current row.
     197 * '''`__class__`''' — Zero or more space-separated CSS class names to be set on the `<tr>` element of the current row. These classes are added to the class name derived from `__color__` and the odd / even indicator.
    196198
    197199'''Example:''' ''List active tickets, grouped by milestone, group header linked to milestone page, colored by priority''
     
    244246=== Reporting on custom fields ===
    245247
    246 If you have added custom fields to your tickets (a feature since v0.8, see TracTicketsCustomFields), you can write a SQL query to cover them. You'll need to make a join on the ticket_custom table, but this isn't especially easy.
     248If you have added custom fields to your tickets (see TracTicketsCustomFields), you can write a SQL query to cover them. You'll need to make a join on the ticket_custom table, but this isn't especially easy.
    247249
    248250If you have tickets in the database ''before'' you declare the extra fields in trac.ini, there will be no associated data in the ticket_custom table. To get around this, use SQL's "LEFT OUTER JOIN" clauses. See [trac:TracIniReportCustomFieldSample TracIniReportCustomFieldSample] for some examples.
    249251
    250 '''Note that you need to set up permissions in order to see the buttons for adding or editing reports.'''
     252=== A note about SQL rewriting #rewriting
     253
     254Beyond the relatively trivial replacement of dynamic variables, the SQL query is also altered in order to support two features of the reports:
     255 1. [#sort-order changing the sort order]
     256 2. pagination support (limitation of the number of result rows displayed on each page)
     257In order to support the first feature, the sort column is inserted in the `ORDER BY` clause in the first position or in the second position if a `__group__` column is specified (an `ORDER BY` clause is created if needed). In order to support pagination, a `LIMIT ... OFFSET ...` clause is appended.
     258The query might be too complex for the automatic rewrite to work correctly, resulting in an erroneous query. In this case you still have the possibility to control exactly how the rewrite is done by manually inserting the following tokens:
     259 - `@SORT_COLUMN@`, the place where the name of the selected sort column will be inserted,
     260 - `@LIMIT_OFFSET@`, the place where the pagination support clause will be added
     261Note that if you write them after an SQL comment, `--`, you'll effectively disable rewriting if this is what you want!
     262
     263Let's take an example, consider the following SQL query:
     264{{{
     265-- ## 4: Assigned, Active Tickets by Owner ## --
     266
     267--
     268-- List assigned tickets, group by ticket owner, sorted by priority.
     269--
     270
     271SELECT p.value AS __color__,
     272   owner AS __group__,
     273   id AS ticket, summary, component, milestone, t.type AS type, severity, time AS created,
     274   changetime AS _changetime, description AS _description,
     275   reporter AS _reporter
     276  FROM ticket t,enum p
     277  WHERE status = 'assigned'
     278AND p.name=t.priority AND p.type='priority'
     279  ORDER BY __group__, p.value, severity, time
     280}}}
     281
     282The automatic rewrite will be the following (4 rows per page, page 2, sorted by `component`):
     283{{{
     284SELECT p.value AS __color__,
     285   owner AS __group__,
     286   id AS ticket, summary, component, milestone, t.type AS type, severity, time AS created,
     287   changetime AS _changetime, description AS _description,
     288   reporter AS _reporter
     289  FROM ticket t,enum p
     290  WHERE status = 'assigned'
     291AND p.name=t.priority AND p.type='priority'
     292  ORDER BY __group__ ASC, `component` ASC,  __group__, p.value, severity, time
     293 LIMIT 4 OFFSET 4
     294}}}
     295
     296The equivalent SQL query with the rewrite tokens would have been:
     297{{{
     298SELECT p.value AS __color__,
     299   owner AS __group__,
     300   id AS ticket, summary, component, milestone, t.type AS type, severity, time AS created,
     301   changetime AS _changetime, description AS _description,
     302   reporter AS _reporter
     303  FROM ticket t,enum p
     304  WHERE status = 'assigned'
     305AND p.name=t.priority AND p.type='priority'
     306  ORDER BY __group__, @SORT_COLUMN@, p.value, severity, time
     307@LIMIT_OFFSET@
     308}}}
     309
     310If you want to always sort first by priority and only then by the user selected sort column, simply use the following `ORDER BY` clause:
     311{{{
     312  ORDER BY __group__, p.value, @SORT_COLUMN@, severity, time
     313}}}
    251314
    252315----