Fix milestones too many SQL variables bug (#10880)

* Fix milestones too many SQL variables bug

* Fix test

* Don't display repositories with no milestone and fix tests

* Remove unused code and add some comments

3 files changed, 72 insertions, 21 deletions

diff --git a/models/issue_milestone.go b/models/issue_milestone.go
index ba39e6ebc6..6bef35ce6e 100644
--- a/models/issue_milestone.go
+++ b/models/issue_milestone.go
@@ -525,10 +525,12 @@ func DeleteMilestoneByRepoID(repoID, id int64) error {
 	return sess.Commit()
 }
 
-// CountMilestonesByRepoIDs map from repoIDs to number of milestones matching the options`
-func CountMilestonesByRepoIDs(repoIDs []int64, isClosed bool) (map[int64]int64, error) {
+// CountMilestones map from repo conditions to number of milestones matching the options`
+func CountMilestones(repoCond builder.Cond, isClosed bool) (map[int64]int64, error) {
 	sess := x.Where("is_closed = ?", isClosed)
-	sess.In("repo_id", repoIDs)
+	if repoCond.IsValid() {
+		sess.In("repo_id", builder.Select("id").From("repository").Where(repoCond))
+	}
 
 	countsSlice := make([]*struct {
 		RepoID int64
@@ -548,11 +550,21 @@ func CountMilestonesByRepoIDs(repoIDs []int64, isClosed bool) (map[int64]int64,
 	return countMap, nil
 }
 
-// GetMilestonesByRepoIDs returns a list of milestones of given repositories and status.
-func GetMilestonesByRepoIDs(repoIDs []int64, page int, isClosed bool, sortType string) (MilestoneList, error) {
+// CountMilestonesByRepoIDs map from repoIDs to number of milestones matching the options`
+func CountMilestonesByRepoIDs(repoIDs []int64, isClosed bool) (map[int64]int64, error) {
+	return CountMilestones(
+		builder.In("repo_id", repoIDs),
+		isClosed,
+	)
+}
+
+// SearchMilestones search milestones
+func SearchMilestones(repoCond builder.Cond, page int, isClosed bool, sortType string) (MilestoneList, error) {
 	miles := make([]*Milestone, 0, setting.UI.IssuePagingNum)
 	sess := x.Where("is_closed = ?", isClosed)
-	sess.In("repo_id", repoIDs)
+	if repoCond.IsValid() {
+		sess.In("repo_id", builder.Select("id").From("repository").Where(repoCond))
+	}
 	if page > 0 {
 		sess = sess.Limit(setting.UI.IssuePagingNum, (page-1)*setting.UI.IssuePagingNum)
 	}
@@ -574,25 +586,45 @@ func GetMilestonesByRepoIDs(repoIDs []int64, page int, isClosed bool, sortType s
 	return miles, sess.Find(&miles)
 }
 
+// GetMilestonesByRepoIDs returns a list of milestones of given repositories and status.
+func GetMilestonesByRepoIDs(repoIDs []int64, page int, isClosed bool, sortType string) (MilestoneList, error) {
+	return SearchMilestones(
+		builder.In("repo_id", repoIDs),
+		page,
+		isClosed,
+		sortType,
+	)
+}
+
 // MilestonesStats represents milestone statistic information.
 type MilestonesStats struct {
 	OpenCount, ClosedCount int64
 }
 
+// Total returns the total counts of milestones
+func (m MilestonesStats) Total() int64 {
+	return m.OpenCount + m.ClosedCount
+}
+
 // GetMilestonesStats returns milestone statistic information for dashboard by given conditions.
-func GetMilestonesStats(userRepoIDs []int64) (*MilestonesStats, error) {
+func GetMilestonesStats(repoCond builder.Cond) (*MilestonesStats, error) {
 	var err error
 	stats := &MilestonesStats{}
 
-	stats.OpenCount, err = x.Where("is_closed = ?", false).
-		And(builder.In("repo_id", userRepoIDs)).
-		Count(new(Milestone))
+	sess := x.Where("is_closed = ?", false)
+	if repoCond.IsValid() {
+		sess.And(builder.In("repo_id", builder.Select("id").From("repository").Where(repoCond)))
+	}
+	stats.OpenCount, err = sess.Count(new(Milestone))
 	if err != nil {
 		return nil, err
 	}
-	stats.ClosedCount, err = x.Where("is_closed = ?", true).
-		And(builder.In("repo_id", userRepoIDs)).
-		Count(new(Milestone))
+
+	sess = x.Where("is_closed = ?", true)
+	if repoCond.IsValid() {
+		sess.And(builder.In("repo_id", builder.Select("id").From("repository").Where(repoCond)))
+	}
+	stats.ClosedCount, err = sess.Count(new(Milestone))
 	if err != nil {
 		return nil, err
 	}
diff --git a/models/issue_milestone_test.go b/models/issue_milestone_test.go
index 778ebfbda3..607d36c31c 100644
--- a/models/issue_milestone_test.go
+++ b/models/issue_milestone_test.go
@@ -11,6 +11,7 @@ import (
 
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/timeutil"
+	"xorm.io/builder"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -370,7 +371,7 @@ func TestGetMilestonesStats(t *testing.T) {
 	repo1 := AssertExistsAndLoadBean(t, &Repository{ID: 1}).(*Repository)
 	repo2 := AssertExistsAndLoadBean(t, &Repository{ID: 2}).(*Repository)
 
-	milestoneStats, err := GetMilestonesStats([]int64{repo1.ID, repo2.ID})
+	milestoneStats, err := GetMilestonesStats(builder.In("repo_id", []int64{repo1.ID, repo2.ID}))
 	assert.NoError(t, err)
 	assert.EqualValues(t, repo1.NumOpenMilestones+repo2.NumOpenMilestones, milestoneStats.OpenCount)
 	assert.EqualValues(t, repo1.NumClosedMilestones+repo2.NumClosedMilestones, milestoneStats.ClosedCount)
diff --git a/models/repo_list.go b/models/repo_list.go
index 7ceb88f088..1632e64eb9 100644
--- a/models/repo_list.go
+++ b/models/repo_list.go
@@ -163,6 +163,10 @@ type SearchRepoOptions struct {
 	TopicOnly bool
 	// include description in keyword search
 	IncludeDescription bool
+	// None -> include has milestones AND has no milestone
+	// True -> include just has milestones
+	// False -> include just has no milestone
+	HasMilestones util.OptionalBool
 }
 
 //SearchOrderBy is used to sort the result
@@ -294,6 +298,14 @@ func SearchRepositoryCondition(opts *SearchRepoOptions) builder.Cond {
 	if opts.Actor != nil && opts.Actor.IsRestricted {
 		cond = cond.And(accessibleRepositoryCondition(opts.Actor))
 	}
+
+	switch opts.HasMilestones {
+	case util.OptionalBoolTrue:
+		cond = cond.And(builder.Gt{"num_milestones": 0})
+	case util.OptionalBoolFalse:
+		cond = cond.And(builder.Eq{"num_milestones": 0}.Or(builder.IsNull{"num_milestones"}))
+	}
+
 	return cond
 }
 
@@ -301,7 +313,11 @@ func SearchRepositoryCondition(opts *SearchRepoOptions) builder.Cond {
 // it returns results in given range and number of total results.
 func SearchRepository(opts *SearchRepoOptions) (RepositoryList, int64, error) {
 	cond := SearchRepositoryCondition(opts)
+	return SearchRepositoryByCondition(opts, cond, true)
+}
 
+// SearchRepositoryByCondition search repositories by condition
+func SearchRepositoryByCondition(opts *SearchRepoOptions, cond builder.Cond, loadAttributes bool) (RepositoryList, int64, error) {
 	if opts.Page <= 0 {
 		opts.Page = 1
 	}
@@ -326,16 +342,18 @@ func SearchRepository(opts *SearchRepoOptions) (RepositoryList, int64, error) {
 	}
 
 	repos := make(RepositoryList, 0, opts.PageSize)
-	if err = sess.
-		Where(cond).
-		OrderBy(opts.OrderBy.String()).
-		Limit(opts.PageSize, (opts.Page-1)*opts.PageSize).
-		Find(&repos); err != nil {
+	sess.Where(cond).OrderBy(opts.OrderBy.String())
+	if opts.PageSize > 0 {
+		sess.Limit(opts.PageSize, (opts.Page-1)*opts.PageSize)
+	}
+	if err = sess.Find(&repos); err != nil {
 		return nil, 0, fmt.Errorf("Repo: %v", err)
 	}
 
-	if err = repos.loadAttributes(sess); err != nil {
-		return nil, 0, fmt.Errorf("LoadAttributes: %v", err)
+	if loadAttributes {
+		if err = repos.loadAttributes(sess); err != nil {
+			return nil, 0, fmt.Errorf("LoadAttributes: %v", err)
+		}
 	}
 
 	return repos, count, nil